Дисертації з теми "Lithium polymer cell"
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Lin, Jian. "Novel Lithium Salt and Polymer Electrolytes for Polymer Lithium Batteries." Case Western Reserve University School of Graduate Studies / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=case1215572988.
Повний текст джерелаVickers, Stephen Lee. "Novel zinc and lithium non-aqueous batteries for low rate applications." Thesis, De Montfort University, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.391236.
Повний текст джерелаSlivka, Ján. "Fotovoltaické články pro napájení nízkoodběrových elektronických zařízení." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2013. http://www.nusl.cz/ntk/nusl-220094.
Повний текст джерелаLiu, Cheng. "In situ infrared study on interfacial electrochemistry in energy storage devices." University of Akron / OhioLINK, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=akron1598305190634383.
Повний текст джерелаFeng, Chenrun. "Physical and electrochemical investigation of various dinitrile plasticizers in highly conductive polymer electrolyte membranes for lithium ion battery application." University of Akron / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=akron1495737492563488.
Повний текст джерелаChen, Di. "Design and implementation of microcontroller-based direct methanol fuel cell/lithium polymer battery hybrid energy management system." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/12579.
Повний текст джерелаLudvigsson, Mikael. "Materials for future power sources." Doctoral thesis, Uppsala University, Department of Chemistry, 2000. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-498.
Повний текст джерелаProton exchange membrane fuel cells and lithium polymer batteries are important as future power sources in electronic devices, vehicles and stationary applications. The development of these power sources involves finding and characterising materials that are well suited r the application.
The materials investigated in this thesis are the perfluorosulphonic ionomer NafionTM (DuPont) and metal oxides incorporated into the membrane form of this material. The ionomer is used as polymer electrolyte in proton exchange membrane fuel cells (PEMFC) and the metal oxides are used as cathode materials in lithium polymer batters (LPB).
Crystallinity in cast Nafion films can be introduced by ion beam exposure or aging. Spectroscopic investigations of the crystallinity of the ionomer indicate that the crystalline regions contain less water than amorphous regions and this could in part explain the drying out of the polymer electrolyte membrane in a PEMFC.
Spectroscopic results on the equilibrated water uptake and the state of water in thin cast ionomer films indicate that there is a full proton transfer from the sulphonic acid group in the ionomer when there is one water molecule per sulphonate group.
The LPB cathode materials, lithium manganese oxide and lithium cobalt oxide, were incorporated in situ in Nafion membranes. Other manganese oxides and cobalt oxides were incorporated in situ inside the membrane. Ion-exchange experiments from HcoO2 to LiCoO2 within the membrane were also successful.
Fourier transform infrared spectroscopy, Raman spectroscopy and X-ray diffraction were used for the characterisation of the incorporated species and the Nafion film/membrane.
Picart, Sébastien. "Fonctionnalisation de la polyaniline par des composés soufrés électroactifs en vue de son utilisation en batteries au lithium." Université Joseph Fourier (Grenoble), 1995. http://www.theses.fr/1995GRE10236.
Повний текст джерелаNeri, Marco. "Modélisation électrothermique des accumulateurs au lithium à électrolyte solide polymère." Grenoble INPG, 1996. http://www.theses.fr/1996INPG0220.
Повний текст джерелаGéniès, Sylvie. "Étude de la passivation de l'électrode carbone-lithium." Grenoble INPG, 1998. http://www.theses.fr/1998INPG0008.
Повний текст джерелаMellgren, Niklas. "Validated Modelling of Electrochemical Energy Storage Devices." Licentiate thesis, KTH, Mechanics, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11052.
Повний текст джерелаThis thesis aims at formulating and validating models for electrochemical energy storage devices. More specifically, the devices under consideration are lithium ion batteries and polymer electrolyte fuel cells.
A model is formulated to describe an experimental cell setup consisting of a LixNi0.8Co0.15Al0.05O2 composite porous electrode with three porous separators and a reference electrode between a current collector and a pure Li planar electrode. The purpose of the study being the identification of possible degradation mechanisms in the cell, the model contains contact resistances between the electronic conductor and the intercalation particles of the porous electrode and between the current collector and the porous electrode. On the basis of this model formulation, an analytical solution is derived for the impedances between each pair of electrodes in the cell. The impedance formulation is used to analyse experimental data obtained for fresh and aged LixNi0.8Co0.15Al0.05O2 composite porous electrodes. Ageing scenarios are formulated based on experimental observations and related published electrochemical and material characterisation studies. A hybrid genetic optimisation technique is used to simultaneously fit the model to the impedance spectra of the fresh, and subsequently also to the aged, electrode at three states of charge. The parameter fitting results in good representations of the experimental impedance spectra by the fitted ones, with the fitted parameter values comparing well to literature values and supporting the assumed ageing scenario.
Furthermore, a steady state model for a polymer electrolyte fuel cell is studied under idealised conditions. The cell is assumed to be fed with reactant gases at sufficiently high stoichiometric rates to ensure uniform conditions everywhere in the flow fields such that only the physical phenomena in the porous backings, the porous electrodes and the polymer electrolyte membrane need to be considered. Emphasis is put on how spatially resolved porous electrodes and nonequilibrium water transport across the interface between the gas phase and the ionic conductor affect the model results for the performance of the cell. The future use of the model in higher dimensions and necessary steps towards its validation are briefly discussed.
Best, Adam Samuel 1976. "Lithium-ion conducting electrolytes for use in lithium battery applications." Monash University, School of Physics and Materials Engineering, 2001. http://arrow.monash.edu.au/hdl/1959.1/9240.
Повний текст джерелаLeclere, Mélody. "Synthèse de (poly)électrolytes pour accumulateur Li-ion à haute densité d'énergie." Thesis, Lyon, 2016. http://www.theses.fr/2016LYSEI001/document.
Повний текст джерелаThe thesis work presented in this manuscript focuses on the development of new electrolytes without the use of flammable conventional solvents to improve the security problem batteries. The first part of this work is the preparation of gelled electrolytes from phosphonium ionic liquid. A study is performed on the compatibility between the electrolyte and the polymer host epoxy / amine as well as the influence of the polymerization LI on the network. The thermal properties, and ionic transport viscoelastic gels are discussed. Among the obtained gelled electrolyte, the gel containing the electrolyte (1 M LiTFSI + LI [P66614] [TFSI]) showed interesting electrochemical properties. A gelled system Li | LFP has been implemented and good cycling stability at 100 ° C was obtained. The second part of this work is the development of new liquid crystal electrolytes promotes transport of lithium ions with hopping mechanism. An anionic compound was synthesized from reaction of an epoxy / amine from lithium 4-amino-1-naphthalenesulfonate and an aliphatic diglycidyl ether. Various characterization technical were used to establish a link structure / properties. The results allowed to show a lamellar supramolecular organization to obtain lithium ion conduction channels. The ion transport measurement helped to highlight a transport of lithium ions following an Arrhenius law (independent of the molecular backbone) which is evidence of a transport mechanism of lithium ions with hopping mechanism. The first electrochemical tests showed good stability of these electrolytes with lithium electrode and a reversible lithium ion transport in a symmetrical cell Li | Li. Following this work, the prospects are discussed to improve the performance of these electrolytes
Gilmour, Robin A. A. "The synthesis, characterisation and application of conjugated imine conducting ladder polymers in rechargeable lithium cells." Thesis, University of Reading, 1998. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.266739.
Повний текст джерелаLee, Sang Ho. "Phenolic resin/polyhedral oligomeric silsesquioxane (POSS) hybrid nanocomposites and advanced composites for use as anode materials in lithium ion batteries." Master's thesis, Mississippi State : Mississippi State University, 2007. http://library.msstate.edu/etd/show.asp?etd=etd-09242007-092626.
Повний текст джерелаMorizur, Vincent. "Fonctionnalisation de polymères et applications dans les domaines de l’énergie, de la catalyse, de la cosmétique et de la santé." Thesis, Nice, 2014. http://www.theses.fr/2014NICE4102.
Повний текст джерелаPolymers are now being studied in many fields such as chemistry, biochemistry, nanotechnology, electronics, medicine or material science and have applications in areas such as automotive industry, food industry, fine chemistry. The objective of this thesis is to achieve the functionalization of polymers and modify the properties of these materials in order to consider new applications. We were interested in polymers with the poly(aryl ether) motif, more particularly poly(ether ether ketone) (PEEK). This polymer is known for its mechanical, thermal, electrical properties and for its resistance to chemicals. In the first chapter, we present the functionalization of different polymers by sulfonyl chloride, sulfonic acid and sulfonamide functions. The second chapter is devoted to the synthesis and electrochemical study of novel polymeric electrolytes and new membranes for potential applications in the field of lithium and sodium batteries, as well as in the field of fuel cells. In the third chapter, the preparation of new metal catalysts derived from polymeric sulfonic acids is discussed. A study of the catalytic activity of these different polymeric catalysts was carried out on the Friedel-Crafts acylation reaction. The fourth chapter is devoted to the preparation of new materials with interesting optical properties. Finally, in the fifth chapter, the preparation and the study of new materials with antibacterial properties are reported
Nagpure, Suraj R. "SYNTHESIS OF TITANIA THIN FILMS WITH CONTROLLED MESOPORE ORIENTATION: NANOSTRUCTURE FOR ENERGY CONVERSION AND STORAGE." UKnowledge, 2016. http://uknowledge.uky.edu/cme_etds/67.
Повний текст джерелаYong-YiLin and 林永溢. "Polymer/Inorganic Nanoparticle Composites with Asymmetric Trilayer Configuration as Functional Electrolyte Membrane for Full-cell Lithium Ion Battery." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/51504717528638951084.
Повний текст джерела國立成功大學
化學工程學系
104
Asymmetric trilayer membrane shall be first used in full cell lithium ion battery. By choosing the ceramic fillers of electrospinning solution during layer-by-layer deposition, acidic/basic property can be functionalized in individual layer. The transition from coordination complexes to free lithium ions is expected on the surface of SiO2 nanoparticles. On the other side, anions accumulated on the surface of nanoparticle can provide an efficient pathway for lithium ions. The pivotal concept of zeta potential difference for polarization behavior is stressed in the electrolyte and it is different from the case in conventional nanocomposite membrane. It is observed that the performance of electrolyte membranes has no direct relation with their ionic conductivity. Poly(acrylonitrile) based electrolyte membrane with asymmetric trilayer configuration can exhibit 1.60 mS cm−1 at 30 oC. It provides a capacity of 110 mAh g−1 at 5 C-rate and retain 87% initial capacity after 500 cycles. The rate capability of the battery is comparable to that assembled with commercial trilayer membrane. It can sustain at 0.5 mA cm−2 without internal short circuit during 270 h lithium stripping-plating process. With modern electrospray or electrospinning process, the unique configuration applications of this technology include full cell lithium ion batteries, supercapacitors and other battery systems made up of asymmetric electrode configuration.
Ward, Ian M., J. J. Kaschmitter, Glen P. Thompson, Simon C. Wellings, H. V. St A. Hubbard, and H. P. Wang. "Separator-free rechargeable lithium ion cells produced by the extrusion lamination of polymer gel electrolytes." 2006. http://hdl.handle.net/10454/3332.
Повний текст джерелаPolymer gel electrolytes (PGE) based on polyvinylidene fluoride (PVDF), lithium salts and appropriate solvent systems, developed at Leeds University, have been shown to form tough rigid films with conductivities approaching 10¿2 S cm¿1. A continuous process has now been developed for the construction of rechargeable lithium cells by extruding the PGE as a melt and directly laminating between the anode and cathode electrodes. On cooling, the solid PGE acts as electrolyte and separator and binds the cell laminate together from within requiring no external case. This process has been successfully applied for the fabrication of cells with electrodes developed by SpectraPower Inc. in a commercial process enabling cell laminates with PGE thickness less than 0.1 mm and with energy densities approaching 170 Wh kg¿1. A prototype manufacturing facility has been set up to produce rechargeable cells of high specific capacity and high energy density. Future developments will enable rechargeable lithium ion cells to be produced on a continuous process as flat sheets opening the way for novel battery geometries.
Sloop, Steven E. "Synthesis and characterization of polymer electrolytes and related nanocomposites." Thesis, 1996. http://hdl.handle.net/1957/34609.
Повний текст джерелаSanghi, Shilpi. "Ion mobility studies of functional polymeric materials for fuel cells and lithium ion batteries." 2011. https://scholarworks.umass.edu/dissertations/AAI3482662.
Повний текст джерелаLi, Hsieh Yu, and 李協昱. "Preparation of Polymeric Electrospun Fibers and Their Applications for Fuel Cells and Lithium-Ion Batteries." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/07792712468199242062.
Повний текст джерела國立清華大學
化學工程學系
103
This research focuses on the preparation and surface modification of electrospun nanofibers and their application in the proton exchange membranes for fuel cells and the porous separators for lithium-ion batteries. In the first part, polybenzimidazole (PBI) is electrospun into nanofiber mats with a polybenzoxazine as a crosslinking agent. The thermally crosslinked PBI electrospun nanofiber mats (CR-PBI-NF) are impregnated with PBI solutions to result in CR-PBI-NF reinforced PBI composite membranes. Based on the crosslinked structures, the nanofiber morphology could be maintained in the PBI composite membranes, so as to enhance their mechanical strength with a Young’s modulus of about 2200 MPa and stress strength of 85 MPa, which is 3.0-fold and 1.35-fold of the values recorded with the neat PBI membrane. The composite membranes also exhibit good dimensional stability upon acid-doping with dimensional changes less than 20%. The nanofibers also provide as proton-conducting pathways in the composite membranes so as to increase their proton conductivity from 0.85 to 0.17 S cm-1 at160 oC. As a result, the single cell employing the composite membranes shows better cell performance than the results observed with the pristine PBI membrane. The nanofiber-reinforcement approach is further applied to Nafion-based membranes with surface-modified poly(vinylidene fluoride) electrospun nanofibers (PVDFNF) as the reinforcements. Both Nafion and poly(styrene sulfonic acid) chains are chemically incorporated to the PVDFNF surfaces to improve the interfacial compatibility between the nanofiobers and Nafion matrix and to induce proton-conducting channels along the nanofiber surfaces in the composite membranes. With the formation of proton-conducting pathways, the Nafion composite membranes exhibit low activation energy of proton conduction (about 2.4-3.0 kJ mol-1), high proton conductivity (about 106 mS cm-1), and depressed methanol permeability compared to the neat Nafion membrane. Consequently, the Nafion composite membrane based H2/O2 single cells show a maximum power density of 770 mW cm-2, which is 1.5-fold of the value recorded with the commercial Nafion 212 membrane. Meanwhile, the low methanol permeability of Nafion-based composite membranes makes it be suitable for direct methanol fuel cells (DMFCs). With a 5 M methanol solution as a feeding fuel, the single cell shows a maximum power density of 122 mW cm-2 and a current density at 0.2 V of 610 mA cm-2. The other part of this work involves the preparation of electrospun nanofiber mats of a mainchain polybenzoxazine (PBz, number averaged molecular weight: about 6,700 g mol-1) prepared with 4,4’-diaminodophenyl ether, bisphenol-A, and paraformaldehyde. The thermally crosslinked electrospun PBz nanofiber mats (CR-PBz-FbM) show some attractive properties, including hydrophobic surface with a water contact angle of about 147o, water-pinning durability, blood and protein repellency, shape-reforming ability, and robust mechanical and chemical resistance. The CR-PBz-FbM (thickness of about 80 μm, porosity of 76 %, and mean pore size of 4.0 μm) has been evaluated as a separator for lithium-ion batteries. They exhibit an very high electrolyte uptake (about 825 %), high ionic conductivity (2.92 mS cm-1), and a near-zero thermal shrinkage at 150 oC for 0.5 h. As a result, the performance of the half-cell tests on the CR-PBz-FbM-based lithium-ion battery demonstrate a high energy density of 118 mAh g-1 at 2.0 C is and good cycling stability after 50 charge-discharge cycles at 0.2 C.