Thematische Bibliographien / Materials for positive electrode

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Auswahl der wissenschaftlichen Literatur zum Thema „Materials for positive electrode“

Autor: Grafiati

Veröffentlicht am 28. Juni 2021

Zuletzt aktualisiert am 14. Februar 2022

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Zeitschriftenartikel zum Thema "Materials for positive electrode"

Tsai, Shan-Ho, Ying-Ru Chen, Yi-Lin Tsou, Tseng-Lung Chang, Hong-Zheng Lai und Chi-Young Lee. „Applications of Long-Length Carbon Nano-Tube (L-CNT) as Conductive Materials in High Energy Density Pouch Type Lithium Ion Batteries“. Polymers 12, Nr. 7 (30.06.2020): 1471. http://dx.doi.org/10.3390/polym12071471.

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Lots of lithium ion battery (LIB) products contain lithium metal oxide LiNi5Co2Mn3O2 (LNCM) as the positive electrode’s active material. The stable surface of this oxide results in high resistivity in the battery. For this reason, conductive carbon-based materials, including acetylene black and carbon black, become necessary components in electrodes. Recently, carbon nano-tube (CNT) has appeared as a popular choice for the conductive carbon in LIB. However, a large quantity of the conductive carbon, which cannot provide capacity as the active material, will decrease the energy density of batteries. The ultra-high cost of CNT, compared to conventional carbon black, is also a problem. In this work, we are going to introduce long-length carbon nano-tube s(L-CNT) into electrodes in order to design a reduced-amount conductive carbon electrode. The whole experiment will be done in a 1Ah commercial type pouch LIB. By decreasing conductive carbon as well as increasing the active material in the positive electrode, the energy density of the LNCM-based 1Ah pouch type LIB, with only 0.16% of L-CNT inside the LNCM positive electrode, could reach 224 Wh/kg and 549 Wh/L, in weight and volume energy density, respectively. Further, this high energy density LIB with L-CNT offers stable cyclability, which may constitute valuable progress in portable devices and electric vehicle (EV) applications.

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Saulnier, M., A. Auclair, G. Liang und S. B. Schougaard. „Manganese dissolution in lithium-ion positive electrode materials“. Solid State Ionics 294 (Oktober 2016): 1–5. http://dx.doi.org/10.1016/j.ssi.2016.06.007.

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Sakuda, A., N. Taguchi, T. Takeuchi, H. Kobayashi, H. Sakaebe, K. Tatsumi und Z. Ogumi. „Amorphous Niobium Sulfides as Novel Positive-Electrode Materials“. ECS Electrochemistry Letters 3, Nr. 7 (22.05.2014): A79—A81. http://dx.doi.org/10.1149/2.0091407eel.

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Wang, Faxing, Xiongwei Wu, Chunyang Li, Yusong Zhu, Lijun Fu, Yuping Wu und Xiang Liu. „Nanostructured positive electrode materials for post-lithium ion batteries“. Energy & Environmental Science 9, Nr. 12 (2016): 3570–611. http://dx.doi.org/10.1039/c6ee02070d.

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Ratynski, Maciej, Bartosz Hamankiewicz, Michal Krajewski, Maciej Boczar, Dominika Ziolkowska und Andrzej Czerwinski. „Single Step, Electrochemical Preparation of Copper-Based Positive Electrode for Lithium Primary Cells“. Materials 11, Nr. 11 (29.10.2018): 2126. http://dx.doi.org/10.3390/ma11112126.

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Lithium primary cells are commonly used in applications where high energy density and low self-discharge are the most important factors. This include small coin cells for electronics, power backup batteries for complementary metal-oxide-semiconductor memory or as a long-term emergency power source. In our study we present a fast, electrochemical method of the positive electrode preparation for lithium primary cells. The influence of the current density and oxygen presence in a solution on the preparation of the electrode and thus its electrochemical behavior is examined. Electrode compositions were characterized by X-ray photoelectron spectroscopy (XPS). The prepared electrodes may be used in Li cells as competition to Zn-MnO2 primary batteries.

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Eliseeva, Svetlana N., Mikhail A. Kamenskii, Elena G. Tolstopyatova und Veniamin V. Kondratiev. „Effect of Combined Conductive Polymer Binder on the Electrochemical Performance of Electrode Materials for Lithium-Ion Batteries“. Energies 13, Nr. 9 (01.05.2020): 2163. http://dx.doi.org/10.3390/en13092163.

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The electrodes of lithium-ion batteries (LIBs) are multicomponent systems and their electrochemical properties are influenced by each component, therefore the composition of electrodes should be properly balanced. At the beginning of lithium-ion battery research, most attention was paid to the nature, size, and morphology peculiarities of inorganic active components as the main components which determine the functional properties of electrode materials. Over the past decade, considerable attention has been paid to development of new binders, as the binders have shown great effect on the electrochemical performance of electrodes in LIBs. The study of new conductive binders, in particular water-based binders with enhanced electronic and ionic conductivity, has become a trend in the development of new electrode materials, especially the conversion/alloying-type anodes. This mini-review provides a summary on the progress of current research of the effects of binders on the electrochemical properties of intercalation electrodes, with particular attention to the mechanisms of binder effects. The comparative analysis of effects of three different binders (PEDOT:PSS/CMC, CMC, and PVDF) for a number of oxide-based and phosphate-based positive and negative electrodes for lithium-ion batteries was performed based on literature and our own published research data. It reveals that the combined PEDOT:PSS/CMC binder can be considered as a versatile component of lithium-ion battery electrode materials (for both positive and negative electrodes), effective in the wide range of electrode potentials.

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Kwon, Nam Hee, Joanna Conder, Mohammed Srout und Katharina M. Fromm. „Surface Modifications of Positive-Electrode Materials for Lithium Ion Batteries“. CHIMIA International Journal for Chemistry 73, Nr. 11 (01.11.2019): 880–93. http://dx.doi.org/10.2533/chimia.2019.880.

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Lithium ion batteries are typically based on one of three positive-electrode materials, namely layered oxides, olivine- and spinel-type materials. The structure of any of them is 'resistant' to electrochemical cycling, and thus, often requires modification/post-treatment to improve a certain property, for example, structural stability, ionic and/or electronic conductivity. This review provides an overview of different examples of coatings and surface modifications used for the positive-electrode materials as well as various characterization techniques often chosen to confirm/detect the introduced changes. It also assesses the electrochemical success of the surface-modified positive-electrode materials, thereby highlighting remaining challenges and pitfalls.

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Li, Wangda, Bohang Song und Arumugam Manthiram. „High-voltage positive electrode materials for lithium-ion batteries“. Chemical Society Reviews 46, Nr. 10 (2017): 3006–59. http://dx.doi.org/10.1039/c6cs00875e.

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The ever-growing demand for advanced rechargeable lithium-ion batteries in portable electronics and electric vehicles has spurred intensive research efforts on high-voltage positive electrode materials over the past decade.

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DuprÃ©, N. „Positive electrode materials for lithium batteries based on VOPO4“. Solid State Ionics 140, Nr. 3-4 (01.04.2001): 209–21. http://dx.doi.org/10.1016/s0167-2738(01)00818-9.

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Guyomard, Dominique, Annie Le Gal La Salle, Yves Piffard, Alain Verbaere und Michel Tournoux. „Negative and positive electrode materials for lithium-ion batteries“. Comptes Rendus de l'Académie des Sciences - Series IIC - Chemistry 2, Nr. 11-13 (November 1999): 603–10. http://dx.doi.org/10.1016/s1387-1609(00)88572-2.

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Dissertationen zum Thema "Materials for positive electrode"

Clark, John. „Computer modelling of positive electrode materials for lithium and sodium batteries“. Thesis, University of Bath, 2014. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616648.

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Providing cleaner sources of energy will require significant improvements to the solid-state materials available for energy storage and conversion technologies. Rechargeable lithium and sodium batteries are generally regarded as the best available candidates for future energy storage applications, particularly with regard to implementation within hybrid or fully electric vehicles, due to their high energy density. However, production of the next generation of rechargeable batteries will require significant improvements in the materials available for the cathode, anode and electrolyte. Modern computer modelling techniques enable valuable insights into the fundamental defect, ion transport and voltage properties of battery materials at the atomic level. Polyanionic framework materials are being investigated as alternative cathodes to LiCoO2 in Li-ion batteries largely due to their greater stability, cost and environmental benefits. In this thesis, four types of polyanion materials are examined using computational techniques. Firstly, the pyrophosphate material, Li2FeP2O7 is investigated, which has the highest voltage (3.5 V) for an iron-based phosphate cathode. In this pyrophosphate material the anti-site defect in which the Li+ and Fe2+ cations exchange positions is the intrinsic defect type found with the lowest energy. Lithium ion diffusion will follow non-linear, curved paths in the b-axis and c-axis directions, which show low migration energies. Hence, in contrast to 1D diffusion in LiFePO4, fast Li+ transport in Li2FeP2O7 is predicted to be through a 2D network in the bc-plane, which is important for good rate capability and for the function of particles without nano-sizing. Favourable doping is found for Na+ on the Li+ site, and isovalent dopants (e.g., Mn2+, Co2+, Cu2+) on the Fe2+ site; the latter could be used in attempts to increase the Fe2+/Fe3+ redox potential towards 4V. Secondly, the relative abundance and low cost associated with Na-ion batteries now make them an attractive alternative for large-scale grid storage. Therefore, defect chemistry and ion migration results are presented for the sodium-based pyrophosphate framework, Na2MP2O7 (where M = Fe, Mn). Formation energies for Na/M ion exchange are found to be higher than Li/Fe exchange, which has been related to the larger size of the Na ion compared to the Li ion. Low activation energies are found for long-range diffusion in all crystallographic directions in Na2MP2O7 suggesting three-dimensional (3D) Na-diffusion. Thirdly, the search for high voltage cathodes for lithium-ion batteries has led to recent interest in the Li2Fe(SO4)2 material which has a voltage of 3.83 V vs lithium, the highest recorded for a fluorine-free iron-based compound. Ion conduction paths through the Li2M(SO4)2 (M = Fe, Mn, Co) marinite family of cathode materials, show low activation energies for lithium migration along the a-axis channels giving rise to long-range 1D diffusion, supported by molecular dynamics (MD) simulations. Density functional theory (DFT) simulations were used to reproduce the observed high voltage of Li2Fe(SO4)2 and to make predictions of the voltages of both Li2Mn(SO4)2 and Li2Co(SO4)2, and also examine local structural distortions on lithium extraction. Finally, the layered and tavorite polymorphs of LiFeSO4OH have recently attracted interest as sustainable cathode materials offering low temperature synthesis routes. Using DFT techniques the experimental voltage and structural parameters are accurately reproduced for the tavorite polymorph. An important result for the layered structure, is that similar accuracy in both cell voltage and structure can only be obtained if a van der Waals functional is included in the DFT methodology to account for the inter-layer binding.

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Blidberg, Andreas. „Iron Based Materials for Positive Electrodes in Li-ion Batteries : Electrode Dynamics, Electronic Changes, Structural Transformations“. Doctoral thesis, Uppsala universitet, Strukturkemi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-317014.

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Li-ion battery technology is currently the most efficient form of electrochemical energy storage. The commercialization of Li-ion batteries in the early 1990’s revolutionized the portable electronics market, but further improvements are necessary for applications in electric vehicles and load levelling of the electric grid. In this thesis, three new iron based electrode materials for positive electrodes in Li-ion batteries were investigated. Utilizing the redox activity of iron is beneficial over other transition metals due to its abundance in the Earth’s crust. The condensed phosphate Li2FeP2O7 together with two different LiFeSO4F crystal structures that were studied herein each have their own advantageous, challenges, and scientific questions, and the combined insights gained from the different materials expand the current understanding of Li-ion battery electrodes. The surface reaction kinetics of all three compounds was evaluated by coating them with a conductive polymer layer consisting of poly(3,4-ethylenedioxythiophene), PEDOT. Both LiFeSO4F polymorphs showed reduced polarization and increased charge storage capacity upon PEDOT coating, showing the importance of controlling the surface kinetics for this class of compounds. In contrast, the electrochemical performance of PEDOT coated Li2FeP2O7 was at best unchanged. The differences highlight that different rate limiting steps prevail for different Li-ion insertion materials. In addition to the electrochemical properties of the new iron based energy storage materials, also their underlying material properties were investigated. For tavorite LiFeSO4F, different reaction pathways were identified by in operando XRD evaluation during charge and discharge. Furthermore, ligand involvement in the redox process was evaluated, and although most of the charge compensation was centered on the iron sites, the sulfate group also played a role in the oxidation of tavorite LiFeSO4F. In triplite LiFeSO4F and Li2FeP2O7, a redistribution of lithium and iron atoms was observed in the crystal structure during electrochemical cycling. For Li2FeP2O7, and increased randomization of metal ions occurred, which is similar to what has been reported for other iron phosphates and silicates. In contrast, triplite LiFeSO4F showed an increased ordering of lithium and iron atoms. An electrochemically induced ordering has previously not been reported upon electrochemical cycling for iron based Li-ion insertion materials, and was beneficial for the charge storage capacity of the material.

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Sun, Meiling. „Elaboration of novel sulfate based positive electrode materials for Li-ion batteries“. Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066686/document.

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Le besoin croissant de batteries à ions lithium dans notre société exige le développement de matériaux d'électrode positive, avec des exigences spécifiques en termes de densité énergétique, de coût et de durabilité. Dans ce but, nous avons exploré quatre composés à base de sulfate: un fluorosulfate - LiCuSO4F et une famille d'oxysulfates - Fe2O(SO4)2, Li2Cu2O(SO4)2 and Li2VO(SO4)2. Leur synthèse, structure et performances électrochimiques sont présentées pour la première fois. Étant électrochimiquement inactif, LiCuSO4F présente une structure triplite ordonnée qui est distincte des autres fluorosulfates. L'activité électrochimique des composés oxysulfate a été explorée face au lithium. Plus spécifiquement, Fe2O(SO4)2 délivre une capacité réversible d'environ 125 mA∙h/g à 3.0 V par rapport à Li+/Li0; Li2VO(SO4)2 et Li2Cu2O(SO4)2 présentent respectivement les potentiels les plus élevés de 4.7 V vs. Li+/Li0 parmi les composés à base de V et de Cu. Enfin, la phase Li2Cu2O(SO4)2 révèle la possibilité d'une activité électrochimique anionique dans une électrode positive polyanionique. Leurs propriétés physiques, telles que les conductivités ioniques et les propriétés magnétiques, sont également rapportées. Dans l'ensemble, les oxysulfates sont intéressants à étudier en tant qu'électrodes positives polyanioniques pour les batteries à ions lithium
The increasing demand of our society for Li-ion batteries calls for the development of positive electrode materials, with specific requirements in terms of energy density, cost, and sustainability. In such a context, we explored four sulfate based compounds: a fluorosulfate – LiCuSO4F, and a family of oxysulfates – Fe2O(SO4)2, Li2Cu2O(SO4)2 and Li2VO(SO4)2. Herein their synthesis, structure, and electrochemical performances are presented for the first time. Being electrochemically inactive, LiCuSO4F displays an ordered triplite structure which is distinct from other fluorosulfates. The electrochemical activity of the oxysulfate compounds was explored towards lithium. Specifically, Fe2O(SO4)2 delivers a sustained reversible capacity of about 125 mA∙h/g at 3.0 V vs. Li+/Li0; Li2VO(SO4)2 and Li2Cu2O(SO4)2 respectively exhibit the highest potential of 4.7 V vs. Li+/Li0 among V- and Cu- based compounds. Last but not least, the Li2Cu2O(SO4)2 phase reveals the possibility of anionic electrochemical activity in a polyanionic positive electrode. Their physical properties, such as ionic conductivities and magnetic properties are also reported. Overall, this makes oxysulfates interesting to study as polyanionic positive electrodes for Li-ion batteries

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Martin, Andréa Joris Quentin. „Nano-sized Transition Metal Fluorides as Positive Electrode Materials for Alkali-Ion Batteries“. Doctoral thesis, Humboldt-Universität zu Berlin, 2020. http://dx.doi.org/10.18452/21619.

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Übergangsmetallfluoridverbindungen sind sehr vielversprechende Kandidaten für die nächste Generation von Kathoden für Alkaliionenbatterien. Dennoch verhindern einige Nachteile dieser Materialklasse ihre Anwendung in Energiespeichermedien. Metallfluoride haben eine stark isolierende Wirkung, außerdem bewirken die Mechanismen beim Lade-/Entladevorgang, große Volumenänderungen und somit eine drastische Reorganisation des Materials, welche nur geringfügig umkehrbar ist. Um diese Nachteile zu reduzieren, werden in dieser Arbeit innovative Syntheserouten für die Umwandlung von Metallfluoridverbindungen sowie deren Anwendung in Alkaliionenbatterien vorgestellt. Im ersten Teil werden MFx Verbindungen (M = Co, Fe; x = 2 oder 3) untersucht. Diese Materialien zeigen eine hohe Ausgangskapazität aber nur bei sehr geringen C-Raten und zudem sehr geringe Zyklisierbarkeiten. Ex-situ-XRD und -TEM zeigen, dass die geringe Umkehrbarkeit der Prozesse hauptsächlich aus der Umwandlungsreaktion während des Be-/Entladens resultieren. Im zweiten Teil werden sowohl die Synthesen als auch die elektrochemischen Eigenschaften von Perowskiten aus Übergangsmetallfluoriden vorgestellt. NaFeF3 zeigt hierbei exzellente Leistungen und Reversibilitäten. Die Untersuchung der Mechansimen durch ex-situ und operando XRD während der Be- und Entladeprozesse hinsichtlich verschiedener Alkalisysteme zeigt, dass das kristalline Netzwerk über den Zyklus erhalten bleibt. Dies führt zur hohen Reversibilität und hohen Leistung selbst bei hohen C-Raten. Der Erhalt der Kristallstruktur wird durch elektrochemische Stabilisierung der kubischen Konformation von FeF3 ermöglicht, welche normalerweise erst bei hohen Temperaturen (400 °C) beobachtet wird und durch geringere Reorganisationen innerhalb des Kristallgerüsts erklärt werden kann. Ähnliche elektrochemische Eigenschaften können für KFeF3 und NH4FeF3 beobachtet werden, wobei erstmalig von Ammoniumionen als Ladungsträger in Alkaliionensystemen berichtet wird.
Metal fluoride compounds appear as very appealing candidates for the next generation of alkali-ion battery cathodes. However, many drawbacks prevent this family of compounds to be applicable to storage systems. Metal fluorides demonstrate a high insulating character, and the mechanisms involved during the discharge/charge processes atom engender large volume changes and a drastic reorganization of the material, which induces poor reversibility. In order to answer these problematics, the present thesis reports the elaboration of innovative synthesis routes for transition metal fluoride compounds and the application of these fluoride materials in alkali-ion battery systems. In a first part, MFx compounds (M = Co, Fe; x = 2 or 3) are studied. Those compounds exhibit high initial capacity but very poor cyclability and low C-rate capabilities. Ex-situ X-ray diffraction and transmission electron microscopy demonstrate that the low reversibility of the processes is mainly due to the conversion reaction occurring during their discharge/charge. In the second part, the syntheses of transition metal fluoride perovskites are reported, as well as their electrochemical properties. NaFeF3 demonstrates excellent performances and reversibility. The study of the mechanisms occurring during its charge/discharge processes towards different alkali systems by ex-situ and operando X-ray diffraction reveals that its crystalline framework is maintained along the cycles, resulting in high reversibility and excellent C-rate performance. This retention of the crystal framework is possible by an electrochemical stabilization of a cubic conformation of FeF3, which is usually only observable at high temperature (400 °C), and can be explained by lower reorganizations within the crystal framework. Similar electrochemical properties could be observed for KFeF3 and NH4FeF3, where ammonium ions are reported for the first time as a charge carrier in alkali-ion systems.

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Chen, Chih-Yao. „A study on positive electrode materials for sodium secondary batteries utilizing ionic liquids as electrolytes“. Kyoto University, 2014. http://hdl.handle.net/2433/192207.

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Boivin, Édouard. „Crystal chemistry of vanadium phosphates as positive electrode materials for Li-ion and Na-ion batteries“. Thesis, Amiens, 2017. http://www.theses.fr/2017AMIE0032/document.

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Ce travail de thèse a pour but d'explorer de nouveaux matériaux de type structural Tavorite et de revisiter certains déjà bien connus. Dans un premier temps, les synthèses de compositions ciblées ont été réalisées selon des procédures variées (voies tout solide, hydrothermale, céramique assistée par sol-gel, broyage mécanique) afin de stabiliser d'éventuelles phases métastables et d'ajuster la microstructure impactant fortement les performances électrochimiques de tels matériaux polyanioniques. Ces matériaux ont ensuite été décrits en profondeur, dans leurs états originaux, depuis leurs structures moyennes, grâce aux techniques de diffraction (diffraction des rayons X sur poudres ou sur monocristaux et diffraction des neutrons) jusqu'aux environnements locaux, en utilisant des techniques de spectroscopie (résonance magnétique nucléaire à l'état solide, absorption des rayons X, infra-rouge et Raman). Par la suite, les diagrammes de phases et les processus d'oxydoréduction impliqués pendant l'activité électrochimique des matériaux ont été étudiés grâce à des techniques operando (diffraction et absorption des rayons X). La compréhension des mécanismes impliqués pendant le cyclage permet de mettre en évidence les raisons de leurs limitations électrochimiques : La synthèse de nouveaux matériaux (composition, structure, microstructure) peut maintenant être développée afin de contrepasser ces limitations et de tendre vers de meilleures performances
This PhD work aims at exploring new Tavorite-type materials and at revisiting some of the well-known ones. The syntheses of targeted compositions were firstly performed using various ways (all solid state, hydrothermal, sol-gel assisted ceramic, ball milling) in order to stabilize eventual metastable phases and tune the microstructure impacting strongly the electrochemical performances of such polyanionic compounds. The materials were then described in-depth, at the pristine state, from their average long range structures, thanks to diffraction techniques (powder X-rays, single crystal X-rays and neutrons diffraction), to their local environments, using spectroscopy techniques (solid state Nuclear Magnetic Resonance, X-rays Absorption Spectroscopy, Infra-Red and/or Raman). Thereafter, the phase diagrams and the redox processes involved during electrochemical operation of the materials were investigated thanks to operando techniques (SXRPD and XAS). The in-depth understanding of the mechanisms involved during cycling allows to highlight the reasons of their electrochemical limitations: the synthesis of new materials (composition, structure and microstructure) can now be developed to overcome these limitations and tend toward better performance

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Martin, Andréa Joris Quentin [Verfasser]. „Nano-sized Transition Metal Fluorides as Positive Electrode Materials for Alkali-Ion Batteries / Andréa Joris Quentin Martin“. Berlin : Humboldt-Universität zu Berlin, 2020. http://d-nb.info/1220690406/34.

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Gao, Shuang. „INVESTIGATION OF TRANSITION-METAL IONS IN THE NICKEL-RICH LAYERED POSITIVE ELECTRODE MATERIALS FOR LITHIUM-ION BATTERIES“. UKnowledge, 2019. https://uknowledge.uky.edu/cme_etds/100.

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Layered lithium transition-metal oxides (LMOs) are used as the positive electrode material in rechargeable lithium-ion batteries. Because transition metals undergo redox reactions when lithium ions intercalate in and disintercalate from the lattice, the selection and composition of transition metals largely influence the electrochemical performance of LMOs. Recently, a Ni-rich compound, LiNi0.8Co0.1Mn0.1O2 (NCM811), has drawn much attention. It is expected to replace its state-of-the-art cousins, LiCoO2 (LCO) and LiNi1/3Co1/3Mn1/3O2 (NCM111), because of its higher capacity, lower cost, and reduced toxicity. However, the excess Ni, as a transition-metal element in NCM811, can cause structural and cycling instability. Starting from NCM811, I modified the composition of transition metals by two approaches: 1) introducing cobalt deficiency and 2) substituting Ni, Co, and Mn with Zr. Their influences on the phase, structure, cycling performance, rate capability, and ionic transport were investigated by a variety of characterization techniques. I found that cobalt non-stoichiometry can suppress Ni2+/Li+ cation mixing, but simultaneously promotes the formation of oxygen vacancies, leading to rapid capacity fade and inferior rate capability compared to pristine NCM811. On the other hand, Zr can reside on and expand the lattice of NCM811, and form Li-rich lithium zirconates on their surfaces. In particular, 1% Zr substitution can increase the stability of NCM811 and facilitate Li-ion transport, resulting in enhanced cycling durability and high-rate performance. My studies help improve the understanding of the effects of transition metals on the degradation of the Ni-rich layered positive electrode material and provide modification strategies to enhance its performance and durability for Li-ion battery applications.

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Nakanishi, Shinji. „Studies on Reaction Mechanism of Lithium Air Secondary Battery and Effects of Carbonaceous Materials to Positive Electrode“. 京都大学 (Kyoto University), 2013. http://hdl.handle.net/2433/174954.

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Madsen, Alex. „Lithium iron sulphide as a positive electrode material for rechargeable lithium batteries“. Thesis, University of Southampton, 2013. https://eprints.soton.ac.uk/355748/.

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Lithium iron sulphide has been investigated as a low-cost, high energy density and relatively safe positive electrode material for secondary lithium batteries. Lithium iron sulphide was synthesised, characterised and compared with natural pyrite samples and was shown to have a capacity of 350 mAh.g-1 upon cycling between 1.45 and 2.80 V vs. Li. The capacity was attributed to the Fe2+/Fe3+ redox couple at potentials up to 2.55 V, and oxidation of sulphur sites from Fe3+(S2-)2 to Fe3+S2-(S2)2-0.5 up to 2.80 V. The cycle life performance of lithium iron sulphide is poor when the cell is cycled between 1.45 and 2.80 V, with the cell loosing approximately 1.4 mAh.g-1 per cycle, although this performance is superior to comparable pyrite electrodes. Calcium doped samples of lithium iron sulphide were synthesised. Calcium doping was shown to impact upon lithium transport properties of the bulk lithium iron sulphide, improving the rate performance of the material. Improvements in cycle life performance of the calcium doped samples were offset by decreased specific capacity due to lithium substitution. The poor cycle life performance of lithium iron sulphide cells was attributed to the utilisation of the high voltage plateau corresponding to sulphur site oxidation/reduction. Experiments utilising a variety of negative electrode materials has identified the formation of soluble polysulphide species upon cycling of the cell, which reduce irreversibly at the negative electrode, contributing to active mass loss and poor cycle life performance. In-situ XRD studies have highlighted the structural decomposition that occurs upon utilisation of the sulphide, which results in irreversible amorphisation of the lithium iron sulphide crystal structure. Lithium iron sulphide was treated via coating with lithium boron oxide glass and a novel carbon coating method via thermal decomposition of butyl-methyl-pyrrolydinium-dicyanimide. Both treatments were shown to increase the cycle life performance of lithium iron sulphide, due to decreased dissolution of polysulphide upon cycling. The choice of binder, electrode formulation and electrolyte was also shown to impact upon the cycle life performance of lithium iron sulphide cells.

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Bücher zum Thema "Materials for positive electrode"

Tiwari, Ashutosh, Filiz Kuralay und Lokman Uzun, Hrsg. Advanced Electrode Materials. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119242659.

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Kebede, Mesfin A., und Fabian I. Ezema. Electrode Materials for Energy Storage and Conversion. Boca Raton: CRC Press, 2021. http://dx.doi.org/10.1201/9781003145585.

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Yoshitake, Michiko. Work Function and Band Alignment of Electrode Materials. Tokyo: Springer Japan, 2021. http://dx.doi.org/10.1007/978-4-431-56898-8.

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Ama, Onoyivwe Monday, und Suprakas Sinha Ray, Hrsg. Nanostructured Metal-Oxide Electrode Materials for Water Purification. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-43346-8.

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Gileadi, Eliezer. Electrode kinetics for chemists, chemical engineers and materials scientists. New York: Wiley-VCH, 1993.

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Gileadi, Eliezer. Electrode kinetics for chemists, chemical engineers, and materials scientists. New York: VCH, 1993.

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Minett, Michael Geoffrey. New composite insertion electrode materials for secondary lithium cells. Salford: University of Salford, 1989.

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Symposium on High Temperature Electrode Materials and Characterization (1991 Washington, D.C.). Proceedings of the Symposium on High Temperature Electrode Materials and Characterization. Pennington, NJ: Electrochemical Society, 1991.

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Dams, R. A. J. Performance tests on new electrode materials for hydrogen production by water electrolysis. Luxembourg: Commission of the European Communities, 1986.

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A, Barbero Cesar, und SpringerLink (Online service), Hrsg. Laser Techniques for the Study of Electrode Processes. Berlin, Heidelberg: Springer Berlin Heidelberg, 2012.

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Buchteile zum Thema "Materials for positive electrode"

Rougier, A., und C. Delmas. „LiNi(M)O2 Layered Oxides: Positive Electrode Materials for Lithium Batteries“. In Materials for Lithium-Ion Batteries, 471–76. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4333-2_24.

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Yoshio*, Masaki, und Hideyuki Noguchi. „A Review of Positive Electrode Materials for Lithium-Ion Batteries“. In Lithium-Ion Batteries, 1–40. New York, NY: Springer New York, 2008. http://dx.doi.org/10.1007/978-0-387-34445-4_2.

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Nasirpouri, Farzad. „Fundamentals and Principles of Electrode-Position“. In Electrodeposition of Nanostructured Materials, 75–121. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-44920-3_3.

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Cho, Gyu Bong, Sang Sik Jeong, Soo Moon Park und Tae Hyun Nam. „Application of a Ti-Ni Alloy as a Current Collector of Positive Electrode for Lithium/Sulfur Batteries“. In Materials Science Forum, 650–53. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-966-0.650.

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Momchilov, A., A. Trifonova, B. Banov, B. Puresheva und A. Kozawa. „PTFE-Acetylene Black and Ultrafine Carbon Suspensions as a Conductive Binder and Conductive Additive for the Positive Electrodes of the Lithium and Li-Ion Batteries“. In Materials for Lithium-Ion Batteries, 565–70. Dordrecht: Springer Netherlands, 2000. http://dx.doi.org/10.1007/978-94-011-4333-2_41.

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Machida, Nobuya, und Akitoshi Hayashi. „Sulfur and Sulfide Positive Electrode“. In Next Generation Batteries, 125–35. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6668-8_12.

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Terny, S., und M. A. Frechero. „Study of Phosphate Polyanion Electrodes and Their Performance with Glassy Electrolytes: Potential Application in Lithium Ion Solid-state Batteries“. In Advanced Electrode Materials, 321–54. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119242659.ch8.

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Soloducho, J., J. Cabaj und D. Zając. „Advances in Electrode Materials“. In Advanced Electrode Materials, 1–26. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119242659.ch1.

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Çelebi, Mutlu Sönmez. „Energy Applications: Fuel Cells“. In Advanced Electrode Materials, 397–434. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119242659.ch10.

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Zhu, Mingshan, Mingshan Zhu, Chunyang Zhai und Cheng Lu. „Novel Photoelectrocatalytic Electrodes Materials for Fuel Cell Reactions“. In Advanced Electrode Materials, 435–56. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2016. http://dx.doi.org/10.1002/9781119242659.ch11.

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Konferenzberichte zum Thema "Materials for positive electrode"

Amatucci, Glenn, R. Badway, A. DuPasquier, F. Cosandey und I. Plitz. „Next Generation Positive Electrode Materials Enabled by Nanocomposites: Metal Fluorides“. In 1st International Energy Conversion Engineering Conference (IECEC). Reston, Virigina: American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-6066.

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Yabuuchi, N. „High-capacity positive electrode materials with cationic/anionic redox for non-aqueous batteries“. In 2018 International Conference on Solid State Devices and Materials. The Japan Society of Applied Physics, 2018. http://dx.doi.org/10.7567/ssdm.2018.f-2-01.

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R, Anaswara Raj L., Sreenidhi P R und Baby Sreeja S D. „Study on Positive Electrode material in Li-ion Battery“. In 2021 Second International Conference on Electronics and Sustainable Communication Systems (ICESC). IEEE, 2021. http://dx.doi.org/10.1109/icesc51422.2021.9532787.

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Yi, Yong, Yingyue Sun, Wenxi Tang und Liming Wang. „Temperature sensitivity of voltage-current characteristics for positive corona in coaxial cylindrical electrode“. In 2018 12th International Conference on the Properties and Applications of Dielectric Materials (ICPADM). IEEE, 2018. http://dx.doi.org/10.1109/icpadm.2018.8401257.

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K., Mohanapriya, und Neetu Jha. „Porous graphene sheets as positive electrode material for supercapacitor – battery hybrid energy storage devices“. In DAE SOLID STATE PHYSICS SYMPOSIUM 2016. Author(s), 2017. http://dx.doi.org/10.1063/1.4980398.

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Huang, Hong, Tim Holme und Fritz B. Prinz. „Increased Cathodic Kinetics in IT-SOFCs by Inserting Highly-Conductive Nanocrystalline Materials“. In ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/fuelcell2008-65123.

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One of the crucial factors for improving intermediate-temperature SOFC performance relies on reduction of the activation loss originating from limited electrode reaction kinetics. We investigated the properties and functions of nanocrystalline interlayer via quantum simulation (QS) and electrochemical impedance analyses. Electrode impedances were found to decrease several-fold as a result of introducing a nanocrystalline interlayer and this positive impact was the most significant when the interlayer was a highly ionic-conductive nanocrystalline material. Both exchange current density and maximum power density were highest in the ultra-thin SOFCs (fabricated with MEMS compatible technologies) consisting of a 50nm thick nano-GDC interlayer. Oxygen vacancy formation energies both at the surface and in the bulk of pure zirconia, ceria, yttria-stabilized zirconia (YSZ), and gadolinia doped ceria (GDC) were computed from density functional theory, which provided insight on surface oxygen vacancy densities.

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Di Lillo, Luigi, Wolfram Raither, Claudio Di Fratta, Andrea Bergamini und Paolo Ermanni. „Mechanical Characterization of Electro-Bonded Laminates“. In ASME 2012 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/smasis2012-8031.

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This work reports on the coupled electro-mechanical simulation and mechanical characterization of electro-bonded laminates (EBL). In light of their conceivable implementation in morphing wings as leading/trailing edge reinforcement plates or as active elements for shear center position adaptation, values of shear strength comparable to those achievable by an epoxy resin, i.e. 10–15 [MPa], are needed. Finite element analysis routines have been implemented to gain insights into the shear behavior of EBL under high electric fields. Further, they allowed for the optimization of EBL in terms of electrode shaping in order to obtain a smooth introduction of axial stresses, avoiding thereby the appearance of shear stress singularities at the edges of the structures. Experimental verification was carried out through single lap shear tests. These experiments quantified the mechanical properties of electro bonded interfaces, assessed the importance of the thickness and alignment of electrodes and the degradation of their constitutive layers due to friction.

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Banerjee, Soumik, Sohail Murad und Ishwar K. Puri. „Carbon Nanotubes as Nano-Pumps: A Molecular Dynamics Investigation“. In ASME 4th International Conference on Nanochannels, Microchannels, and Minichannels. ASMEDC, 2006. http://dx.doi.org/10.1115/icnmm2006-96206.

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This paper focuses on the use of carbon nanotubes (CNT) for ion separation and encapsulation from a solution containing both positive and negatively charged ions. Metal ion separation from drinking water or during material processing applications can be an important issue. We use molecular dynamics simulations to demonstrate that a pair of carbon nanotubes with patterned positive and negative charges can form the basis of an effective device for the separation or encapsulation of ions. We consider three different charge patterns: i) Electrodes, where all the atoms of a CNT are charged with a finite surface charge density; ii) Alternate axial bands of positive and negative charges on each electrode; and iii) Alternate circumferential rings of positive and negative charges on the electrodes. The charge pattern determines the preferential intake of water and/or ions by a nanotube. As conventional electrodes they adsorb ions, but with an alternate band or ring charge pattern they adsorb the water molecules. Our simulations show that a charged CNT can be used as a nano-pump that provides purified water or ions from an impure solution.

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Hadinata, Philip C., und John A. Main. „Strain and Current Responses During Electron Flux Excitation of Piezoelectric Ceramics“. In ASME 2002 International Mechanical Engineering Congress and Exposition. ASMEDC, 2002. http://dx.doi.org/10.1115/imece2002-39013.

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The electric field induced strain in piezoelectric materials subjected to an electron flux is examined in this paper. An analysis using quantum mechanics indicates that stable and controllable strains with very low current draw should be achievable over a range of positive and negative control potentials. The model also predicts an instability in the internal electric field at larger negative potentials. The model was evaluated by observing the strain output of PZT5h plates subjected to an electron flux on one face and voltage inputs from a single electrode on the opposite face. The strain response and current flow were measured as a function of electrode potential and electron energy. All of the significant predictions of the model were verified by the experimental results. Further experiments were performed to examine the time response of the strain induced in the plate. It was found that the location and potential of the electron collector dramatically influences the dynamic response of the system.

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Kumar, P. Jeevan, K. Jayanth Babu, O. M. Hussain, Dinesh K. Aswal und Anil K. Debnath. „Electrochemical Performance of rf Magnetron Sputtered LiCoO[sub 2] Thin Film Positive Electrodes“. In INTERNATIONAL CONFERENCE ON PHYSICS OF EMERGING FUNCTIONAL MATERIALS (PEFM-2010). AIP, 2010. http://dx.doi.org/10.1063/1.3530498.

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Berichte der Organisationen zum Thema "Materials for positive electrode"

Wilcox, James Douglas. Studies on two classes of positive electrode materials for lithium-ion batteries. Office of Scientific and Technical Information (OSTI), Dezember 2008. http://dx.doi.org/10.2172/983034.

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Dunn, Bruce. Vanadium Oxide Aerogel Electrode Materials. Fort Belvoir, VA: Defense Technical Information Center, März 2001. http://dx.doi.org/10.21236/ada389142.

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Zimmerman, Albert H. Nickel Hydrogen Cell Positive-Electrode Studies: Cobalt Segregation in Reducing Environments,. Fort Belvoir, VA: Defense Technical Information Center, Mai 1987. http://dx.doi.org/10.21236/ada193025.

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Doeff, Marca M., Robert Kostecki, James Wilcox und Grace Lau. Conductive Carbon Coatings for Electrode Materials. Office of Scientific and Technical Information (OSTI), Juli 2007. http://dx.doi.org/10.2172/925590.

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Keqin Huang. LOWER TEMPERATURE ELECTROLYTE AND ELECTRODE MATERIALS. Office of Scientific and Technical Information (OSTI), April 2001. http://dx.doi.org/10.2172/823828.

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Keqin Huang. LOWER TEMPERATURE ELECTROLYTE AND ELECTRODE MATERIALS. Office of Scientific and Technical Information (OSTI), April 2003. http://dx.doi.org/10.2172/833626.

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Keqin Huang. LOWER TEMPERATURE ELECTROLYTE AND ELECTRODE MATERIALS. Office of Scientific and Technical Information (OSTI), April 2002. http://dx.doi.org/10.2172/823829.

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He, Lin. Synthesis, characterization and application of electrode materials. Office of Scientific and Technical Information (OSTI), Juli 1995. http://dx.doi.org/10.2172/108148.

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Subban, Chinmayee. Developing Novel Electrode Materials for Aqueous Battery. Office of Scientific and Technical Information (OSTI), Januar 2020. http://dx.doi.org/10.2172/1593293.

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Fultz, Brent. The Science of Electrode Materials for Lithium Batteries. Office of Scientific and Technical Information (OSTI), März 2007. http://dx.doi.org/10.2172/900899.

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