Дисертації з теми "Material Electrochemistry"
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Bolger, Paul Thomas. "The electrochemistry of silver co-ordination complexes." Thesis, Queen's University Belfast, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287292.
Повний текст джерелаSiritanaratkul, Bhavin. "Enzyme-material composites for solar-driven reactions." Thesis, University of Oxford, 2017. https://ora.ox.ac.uk/objects/uuid:55df8993-254b-4960-8ef4-fd9624206f3b.
Повний текст джерелаBraham, Victoria Jane. "Corrosion of aluminium in contact with cutting fluids : electrochemistry of corrosion." Thesis, University of Newcastle Upon Tyne, 1997. http://hdl.handle.net/10443/797.
Повний текст джерелаJia, Jingshu. "Fabrication of high quality one material anode and cathode for water electrolysis in alkaline solution /." View abstract or full-text, 2008. http://library.ust.hk/cgi/db/thesis.pl?EVNG%202008%20JIA.
Повний текст джерелаLibot, Cecile. "The influence of cathode material on the reduction of aryl carbonyl compounds : formation of radicals." Thesis, University of Southampton, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.313211.
Повний текст джерелаGrosu, Cristina. "Correlation between structure and electrochemistry of LiMO2 cathode materials (M = Ni, Co)." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2017. http://amslaurea.unibo.it/13355/.
Повний текст джерелаRanganathan, Srikanth. "Preparation, modification and characterization of a novel carbon electrode material for applications in electrochemistry and molecular electronics /." The Ohio State University, 2001. http://rave.ohiolink.edu/etdc/view?acc_num=osu1486398528558482.
Повний текст джерелаTan, Chuting Tan. "Radiation-Induced Material and Performance Degradation of Electrochemical Systems." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu151448116966595.
Повний текст джерелаBeaussant, Törne Karin. "Investigation of corrosion properties of metals for degradable implant applications." Doctoral thesis, KTH, Materialfysik, MF, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-215970.
Повний текст джерелаDegradable metallic implants are a new class of biomaterials with potentialto replace permanent materials in temporary applications to reduce therisk of long term adverse effects.This thesis focuses on in vitro testing of zinc and magnesium based metals.As new degradable metals are developed screening of new materials within vitro test methods is an attractive option to avoid unnecessary, time consumingand expensive animal studies. The influence of factors such as ioniccomposition of the test solution, buffer system, strain and alloy compositionwas investigated. By employing electrochemical in situ techniques such asimpedance spectroscopy it is possible to study the metal-solution interfaceand determine the properties of the corroding surface. Ex situ surface characterizationtechniques such as scanning electron microscopy and infraredspectroscopy were then used to complement the results of the electrochemicalmeasurements.The importance of appropriate selection of the test solution is highlightedin this work. Zinc was found to corrode in Ringer’s solution by a mechanismcloser to in vivo corrosion than in a phosphate buffered saline solution(PBS).Ringer’s solution is therefore the more appropriate test environment for longterm evaluation of zinc based metals.When evaluating the corrosion of Zn-Mg and Zn-Ag alloys in Ringer’ssolution selective dissolution was found to occur for both types of alloys. Localprecipitation and formation of a porous, less protective, layer of corrosionproducts was found for Zn-Mg alloys. The selective dissolution of Zn-Agalloy caused an enrichment of AgZn3 on the surface which may affect thebiocompatibility of the alloy.The use of HEPES to maintain the pH of the test solution increasedthe corrosion rate of magnesium due to formation of a less protective layerof corrosion products. Magnesium corrosion should therefore preferably bestudied in solutions where the pH is maintained by the biological buffer systemCO2/H2CO3.In addition to saline solutions human whole blood and plasma were evaluatedas more clinically relevant in vitro environments. They were found toproduce reproducible results and to be suitable for short term experiments.Formation of a corrosion product layer comprised of both organic and inorganicmaterial was detected on zinc in both plasma and whole blood.During anodic polarization the adsorption of organic species on the zincsurface was found to increase the surface coverage of Zn ions in whole blood.The increased surface coverage then allowed for precipitation of a protectivelayer of Zn5(PO4)3 and a subsequent decrease in corrosion rate at higherpotentials.When subjecting zinc samples to strain the organic/inorganic corrosionproduct formed in whole blood was observed by impedance spectroscopy toprevent micro cracking and premature failure.The cracking of magnesium alloy samples under applied strain was alsocharacterized by impedance. Changes in surface properties due to crack initiation
QC 20171019
Sobkowiak, Adam. "LiFeSO4F as a Cathode Material for Lithium-Ion Batteries : Synthesis, Structure, and Function." Doctoral thesis, Uppsala universitet, Institutionen för kemi - Ångström, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-262715.
Повний текст джерелаLewis, Courtney-Elyce. "Carbon-integrated vanadium oxide hydrate as a high-performance cathode material for zinc-ion batteries." Thesis, Queensland University of Technology, 2022. https://eprints.qut.edu.au/230254/1/Courtney-Elyce_Lewis_Thesis.pdf.
Повний текст джерелаKhatib, Maher Al. "EPR Spectroscopy for the investigation of materials of technological and industrial interest." Doctoral thesis, Università di Siena, 2019. http://hdl.handle.net/11365/1070360.
Повний текст джерелаPlattard, Tiphaine. "Modélisation du vieillissement d'une batterie Lithium-ion : couplage d'un modèle de fatigue avec un modèle comportemental." Thesis, Université Paris-Saclay (ComUE), 2019. http://www.theses.fr/2019SACLS323.
Повний текст джерелаReliable development of LIBs requires accurate aging studies. The objective of the thesis is to clarify on a new cell chemistry (NMC) the impact of the parameters on aging, namely the temperature, the rated current intensity and the state of charge, and to implement it in a predictive and updatable model.A test campaign makes it possible to quantify the unit impact of the aging parameters on the loss of capacity of each battery cell. We integrate the results into a fatigue model. The latter modulates the impact of an exchanged ampere-hour by the exchange conditions of this ampere-hour by means of weighting functions. This model is then implemented in a software, equipped with its man/machine interface. It allows the user to become familiar with aging and to make prediction calculations of loss of battery capacity.This model can drift with time due to repeated solicitation, so its parameters need to be updated by on-field measurements, to remain accurate. These on-field measurements are submitted to the so-called Incremental Capacity Analysis method (ICA), consisting in the analysis of dQ/dV as a function of V. We have shown that the evolution of the peaks observable on the ICA can be correlated with the kinetics of the first fatigue model. This measurement makes it possible to couple with the fatigue model. Finally, application tests validate the method developed
Hussain, Noor Feuza. "Electrochemical Remedy and Analysis for the Environment Based on the New Polymer-DNA Composite Material." Digital Commons @ East Tennessee State University, 2005. https://dc.etsu.edu/etd/1047.
Повний текст джерелаYuan, Qifan. "Physical, electrical and electrochemical characterizations of transition metal compounds for electrochemical energy storage." Diss., Virginia Tech, 2015. http://hdl.handle.net/10919/71869.
Повний текст джерелаPh. D.
Cabelguen, Pierre-Etienne. "Analyse de la microstructure des matériaux actifs d'électrode positive de batteries Lithium-ion." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAI069/document.
Повний текст джерелаFour NMC materials are synthesized by co-precipitation. They exhibit a hierarchical architecture made of reasonably spherical agglomerates. One is constituted of flake-shaped, spatially oriented, crystallites that leave large apparent void spaces in the agglomerate, while the other results from the tight agglomeration of micron-sized cuboids. Porous material exhibits the best power performances. It is impossible to identify a geometrical parameter that predict performances, even after achieving the full characterization of the microstructures. Cyclic voltammetry reveals two behaviours depending on the shape of crystallites: processes limited by solid-state diffusion (cuboids) and the ones limited by charge transfer even at high rates (flake-shaped). This observation challenges active materials design strategies that assume diffusion as the limiting process of lithium intercalation. Focusing on enhancing kinetics could be the way to increase performances. Charge-transfer is first investigated by measuring electronic conductivities over a wide range of frequencies, allowing to discriminate relaxations arising at various length scales. We show that flake-shaped crystallites facilitate the motion of electrons at all scale levels compared to cuboids. Charge-transfer limitations originate from the electrolyte/material interface in materials exhibiting high surface areas. Numerical simulations reveal that BET measurements largely overestimate the actual electroactive surface, which is understood by HRTEM images of flake-shaped crystallites. Only a small percentage, limited to the edge plane is truly electroactive
Dabo, Ismaila. "Towards first-principles electrochemistry." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/44320.
Повний текст джерелаIncludes bibliographical references (p. 143-151).
This doctoral dissertation presents a comprehensive computational approach to describe quantum mechanical systems embedded in complex ionic media, primarily focusing on the first-principles representation of catalytic electrodes under electrochemical conditions. The accurate electrostatic description of electrified metal-solution interfaces represents a persistent challenge for ab-initio simulations and an essential requisite for predicting the electrical response of electrochemical convertors-i.e., the correspondence between the macroscopic voltage and the microscopic interfacial charge distribution. The approach consists of controlling the electrode voltage via its conjugate extensive variable, namely, the charge of the system. As a preliminary to the study of electrified interfaces in ionic media, we analyze charged slabs in vacuum subject to periodic boundary conditions. We show that the corrective potential (defined as the difference between the exact open-boundary potential and the periodic potential obtained from a Fourier transform) varies smoothly over space, allowing for its determination on a coarse mesh using optimized electrostatic solvers. Because this scheme takes into account exact open boundary conditions, its performance is considerably superior to that of conventional corrective methods. Extending this computational scheme, we present an efficient approach to model electrochemical systems under realistic conditions, based on a first-principles description of the interface region and on a continuum representation of the ionic solvent.
(cont.) We demonstrate that the ionicsolution contribution to the electrostatic potential-the ionic solvent reaction field--can be computed independently at low cost simultaneously using fast Fourier transforms and multigrid techniques, and highlight the importance of adopting adequate electrochemical boundary conditions to correctly predict the electrical response of electrode-electrolyte interfaces. In order to probe and validate the electrochemical model, we study the vibrational Stark effect-i.e., the influence of the applied voltage on the vibrational properties-for carbon monoxide adsorbed on transition metal surfaces, a phenomenon whose description requires an accurate representation of the interfacial electric field. We start out the analysis by examining the vibrational properties of CO adsorbed on clean and ruthenium-covered platinum substrates. The calculated C-O stretching frequencies are found to be in excellent agreement with experimental measurements despite the frequent qualitative failures of local and semilocal exchange-correlation functionals in predicting adsorption energies for CO on transition metals. We then introduce an orbital-resolved force analysis to clarify the electronic origins of the C-O red shifts, and present a sensitivity analysis to assess the influence the HOMO and LUMO hybridizations on the calculated frequencies, thereby establishing the remarkable accuracy of conventional density-functional theory methods in determining the vibrational properties of adsorbed CO. Based on these results, we apply the electrochemical model to provide the first comprehensive ab-initio description of the vibrational Stark effect for CO on transition metal surfaces, finding excellent agreement with spectroscopic measurements.
(cont.) As related projects, we have implemented a molecular-dynamics algorithm for metallic systems and developed a self-interaction correction method to rectify the tendency of density-functional theory calculations to overestimate binding energies. The present computational electrochemistry toolkit open promising perspectives for the application of first-principles methods to assist the microstructural engineering of electrochemical convertors.
Ismaila Dabo.
Ph.D.
Xiao, Shaorong. "The electrochemistry of phenothiazine derivatives." Thesis, University of Central Lancashire, 2000. http://clok.uclan.ac.uk/20876/.
Повний текст джерелаBoni, Alessandro <1987>. "Electrochemistry of Nanocomposite Materials for Energy Conversion." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7510/1/boni_alessandro_tesi.pdf.
Повний текст джерелаKloppers, Marius Jacques 1962. "Electrochemistry of iron-chromium alloys." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/106706.
Повний текст джерелаVita.
Includes bibliographical references (leaves 307-314).
by Marius Jacques Kloppers.
Ph.D.
Ziebro, Thomas R. "In vivo PPy(DBS) sensors to quantify excitability of cells via sodium fluctuations in extracellular solution." The Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1492031927557033.
Повний текст джерелаLoget, Gabriel. "Electric field-generated asymmetric reactivity : from materials science to dynamic systems." Thesis, Bordeaux 1, 2012. http://www.theses.fr/2012BOR14572/document.
Повний текст джерелаThe phenomenon of bipolar electrochemistry generates an asymmetric reactivity on the surface ofconductive objects in a wireless manner. This concept is based on the fact that when a conducingobject is placed in an electric field, it gets polarized. Consequently, a potential difference appearsbetween its two extremities, that can be used to drive localized redox reactions. In the presentthesis, bipolar electrochemistry was used for material science and the locomotion of objects.So far, the majority of methods and processes used for the generation of asymmetric objects, alsocalled “Janus” objects, is based on using interfaces to break the symmetry. We developed a newapproach based on bipolar electrodeposition for generating this type of objects in the bulk. Using thistechnology, various materials like metals, polymers and semiconductors could be deposited ondifferent types of conducting particles. We also showed that bipolar electrochemistry can be used forthe microstructuration of conducting substrates.Motion generation by bipolar electrochemistry has also been demonstrated. Some of the Janusobjects synthesized by the previous approach can be used as microswimmers. The asymmetricreactivity that is induced by bipolar electrochemistry can also be used directly to generate motion ofnon‐hybrid objects. With this concept we induced translations, rotations and levitations of carbonand metal particles
au, minakshi@murdoch edu, and Manickam Minakshi Sundaram. "Electrochemistry of Cathode Materials in Aqueous Lithium Hydroxide Electrolyte." Murdoch University, 2006. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20061210.143803.
Повний текст джерелаManickam, Minakshi. "Electrochemistry of cathode materials in aqueous lithium hydroxide electrolyte /." Access via Murdoch University Digital Theses Project, 2006. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20061210.143803.
Повний текст джерелаGillard, Stephen Paul. "Environmental electrochemistry : reactor design, electrode materials and process monitoring." Thesis, University of Portsmouth, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407225.
Повний текст джерелаMinakshi, Sundaram Manickam. "Electrochemistry of cathode materials in aqueous lithium hydroxide electrolyte." Thesis, Minakshi Sundaram, Manickam ORCID: 0000-0001-6558-8317 (2006) Electrochemistry of cathode materials in aqueous lithium hydroxide electrolyte. PhD thesis, Murdoch University, 2006. https://researchrepository.murdoch.edu.au/id/eprint/450/.
Повний текст джерелаMinakshi, Sundaram Manickam. "Electrochemistry of cathode materials in aqueous lithium hydroxide electrolyte." Minakshi Sundaram, Manickam (2006) Electrochemistry of cathode materials in aqueous lithium hydroxide electrolyte. PhD thesis, Murdoch University, 2006. http://researchrepository.murdoch.edu.au/450/.
Повний текст джерелаBelding, Stephen Richard. "Computational electrochemistry." Thesis, University of Oxford, 2012. http://ora.ox.ac.uk/objects/uuid:e997642f-fbaa-469c-98a3-f359b0996f03.
Повний текст джерелаSallis, Shawn. "Understanding the Intrinsic Electrochemistry of Ni-Rich Layered Cathodes." Thesis, State University of New York at Binghamton, 2018. http://pqdtopen.proquest.com/#viewpdf?dispub=10689173.
Повний текст джерелаThe demand for energy is continually increasing overtime and the key to meeting future demand in a sustainable way is with energy storage. Li-ion batteries employing layered transition metal oxide cathodes are one of the most technologically important energy storage technologies. However, current Li-ion batteries are unable to access their full theoretical capacity and suffer from performance limiting degradation over time partially originating from the cathode and partially from the interface with the electrolyte. Understanding the fundamental limitations of layered transition metal oxide cathodes requires a complete understanding of the surface and bulk of the materials in their most delithiated state.
In this thesis, we employ LiNi0.8Co0.15Al 0.05O2 (NCA) as a model system for Ni-rich layered oxide cathodes. Unlike its parent compound, LiCoO2, NCA is capable of high states of delithiation with minimal structural transitions. Furthermore, commercially available NCA has little to no transition metals in the Li layer. X-ray spectroscopies are an ideal tool for studying cathodes at high states of delithiation due their elemental selectivity, range of probing depths, and sensitivity to both chemical and electronic state information. The oxidation state of the transition metals at the surface can be probed via X-ray photoelectron spectroscopy (XPS) while both bulk and surface oxidation states as well as changes in metal oxygen bonding can be probed using X-ray absorption spectroscopy (XAS).
Using X-ray spectroscopy in tandem with electrochemical, transport and microscopy measurements of the same materials, the impedance growth with increasing delithiation was correlated with the formation of a disordered NiO phase on the surface of NCA which was precipitated by the release of oxygen. Furthermore, the surface degradation was strongly impacted by the type of Li salt used in the electrolyte, with the standard commercial salt LiPF6 suffering from exothermic decomposition at high voltages and temperatures. Substituting LiPF6with LiBF4 suppressed NCA surface degradation and the dissolution of the transition metals into the electrolyte which is responsible for the impedance growth. Even in the most extreme conditions (4.75V vs Li +/Li0 at 60 °C for > 100 hrs) the degradation (i.e. metal reduction) was restricted to the first 10-30 nm and no evidence of oxygen loss was observed in the bulk.
However, the transition metal ions were found to cease oxidizing above 4.25 V vs Li+/Li0 despite it being possible to extract 20% more lithium. Using a newly developed high efficiency resonant inelastic x-ray scattering (RIXS) spectrometer to probe the O K-edge of NCA electrodes at various conditions, it was concluded that oxygen participates in the charge compensation at the highest states of delithiation instead of the transition metals. These results are intrinsic to the physical and electronic structure of NCA and appear general to the other layered transition metal oxides currently under consideration for use as cathodes in Li-ion batteries.
Fattah, Zahra Ali. "Applications of bipolar electrochemistry : from materials science to biological systems." Phd thesis, Université Sciences et Technologies - Bordeaux I, 2013. http://tel.archives-ouvertes.fr/tel-00917770.
Повний текст джерелаSÌŒljukicÌ, Biljana. "Novel carbon materials and their application in electrochemistry and electroanalysis." Thesis, University of Oxford, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.442654.
Повний текст джерелаBikkarolla, Santosh Kumar. "Oxygen electrochemistry on inorganic/graphene hybrid materials for energy applications." Thesis, Ulster University, 2015. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.673823.
Повний текст джерелаKeeley, Deborah Michelle. "Electrochemical studies of biologically important materials." Thesis, University of Oxford, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.325879.
Повний текст джерелаZhang, Guohui. "Electrochemistry and applications of sp2 carbon materials : from graphite to graphene." Thesis, University of Warwick, 2016. http://wrap.warwick.ac.uk/89303/.
Повний текст джерелаUssano, Eleonora <1982>. "Electrochemistry of Molecular Systems for New Nanostructured Materials and Bioelectronic Devices." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7641/1/Ussano_Eleonora_tesi.pdf.
Повний текст джерелаUssano, Eleonora <1982>. "Electrochemistry of Molecular Systems for New Nanostructured Materials and Bioelectronic Devices." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2016. http://amsdottorato.unibo.it/7641/.
Повний текст джерелаGiddens, Richard M. "Synthesis and electrochemistry of photoantimicrobial agents based on the azine chromophore." Thesis, University of Central Lancashire, 2007. http://clok.uclan.ac.uk/20791/.
Повний текст джерелаTan, Yu-May. "Mesoporous materials." Thesis, University of Southampton, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370067.
Повний текст джерелаBjelkevig, Cameron. "Surface Chemical Deposition of Advanced Electronic Materials." Thesis, University of North Texas, 2010. https://digital.library.unt.edu/ark:/67531/metadc67938/.
Повний текст джерелаRaekelboom, Emmanuelle Angeline. "Synthesis, structure and electrochemistry of positive insertion materials for rechargeable lithium batteries." Thesis, University of Southampton, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.393971.
Повний текст джерелаWells, Andrea Dawn. "Deposition, surface chemistry, and electrochemistry of YBa₂Cu₃O₇₋(subscript delta) materials." Access restricted to users with UT Austin EID, 2001. http://wwwlib.umi.com/cr/utexas/fullcit?p3036611.
Повний текст джерелаHenrotte, Olivier. "Méthode pour l’analyse de l’activité de la réduction de l’oxygène de catalyseurs sans métaux nobles par microscopie électrochimique." Thesis, Université Paris-Saclay (ComUE), 2018. http://www.theses.fr/2018SACLS473.
Повний текст джерелаThe decrease of fuel cells cost is necessary to provide a worldwide access to the technology. Synthesis of noble metal-free catalysts is a promising way to achieve this goal. The electrochemical analysis of these materials is however not easy either to compare the electrocatalytic properties or to understand the performances of these catalysts. The scientific community generally studies catalysts at a macroscale, where the recorded response is averaged on a very large number of catalytic objects. The works presented here shows the setup of a method to analyze the electrocatalytic activity of noble metal-free catalyst for the oxygen reduction reaction in acidic media by scanning electrochemical microscopy. This method brings several advantages such as the possibility to study and compare multiple catalysts on the same sample at a macro- or a microscale. The comparison of several catalysts with this setup is then. A catalyst has been studied under various conditions of: loading, surface area, weight of catalyst and quantity of additives such as Nafion. The investigation of the material stability is also illustrated. These results suggest large range of application of the technique and many possibilities in the future are now open to investigated noble metal-free electrocatalytic materials
Ndungu, Patrick Gathura Bradley Jean-Claude. "The use of bipolar electrochemistry in nanoscience : contact free methods for the site selective modification of nanostructured carbon materials /." Philadelphia, Pa. : Drexel University, 2004. http://dspace.library.drexel.edu/handle/1860/275.
Повний текст джерелаHedman, Jonas. "Characterization of reaction products in sodium-oxygen batteries : An electrolyte concentration study." Thesis, Uppsala universitet, Strukturkemi, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-317969.
Повний текст джерелаLONGONI, GIANLUCA. "Investigation of Sodium-ion Battery Materials." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2017. http://hdl.handle.net/10281/153278.
Повний текст джерелаNa-ion battery technology has recently aroused great interest among all the scientific community, as a valid and more environmentally friendly alternative to Li-ion batteries. The PhD research activity has been mostly devoted to the investigation of reliable active materials for sodium ion battery technology. All the investigated materials, either anode or cathode, have been investigated trying to highlight the major limits and difficulties connected to sodium intercalation and conversion reactions. Among these, some are: i)assessment of Na diffusion in an intercalating host structure, ii)products and reversibility of transition metal oxides conversion reactions, iii) effects of materials crystalline properties on electrochemical performances and iv) features influencing the overall stability of a functional material. In order to keep the most broad-based overview of the problem, it has been chosen to systematically start, for each species electrochemically investigated, from its synthesis and thorough chemical-physical characterization. Rather than a pure electrochemical analysis, a continuous parallelism between morphological features, structural characteristics and performances was encouraged, eventually obtaining a detailed overlook of different classes of active materials for sodium batteries. What has been screened all along the three year-long research period has been a comprehensive investigation of new generation electrochemically active materials for energy storage applications. This implied an inter-disciplinary work in which advanced electro-analytical techniques have been widely used to characterize inorganic compounds or ad-hoc synthesized composites keeping in mind precise structure-performance correlations. Among the investigated classes, a role of relevance has been reserved to intercalating cathode species and conversion anode materials. The former, typically layered transition metal oxides, phosphates and pyrophosphates, are capable of sodium cations insertion, with fast kinetics, between layers or inside channels generated from peculiar atoms arrangement. Conversion anode materials on the other hand, carries out the sodium storage via spontaneous chemical reactions with oxide-based material, such as Co3O4 or Fe2O3, a chalcogenide or a halide. Compared to intercalation materials, conversion ones are more challenging to deal with, due to the following difficulties: i)their not negligible volume change during conversion reaction and the correlated induced mechanical stresses leading to electrode fracturing and pulverization, ii)occurrence of irreversible and parasitic reactions and iii)material operating potentials is often too high (around 1.0 V vs. Na/Na+) and thus not suitable for being used as anode materials inside a sodium cell. A positive feature that makes these material worthy to be studied is the high sodium uptake they are able to bare, bestowing them high theoretical specific capacities (>800 mAh∙g-1). All these aspects have been tackled in designing a conversion anode that might constitute a valid solution toward a sodium secondary battery whole-cell assembly. Together with anode materials also a high-performing and low-cost cathode material has been investigated. The exploratory study of pyrophosphate-MWCNT composite intercalation material led to interesting results referred to fast kinetics and material reliability throughout the cycles. To TiO2 nanocrystals synthesis and crystalline appearance-electrochemical properties correlation has beeb dedicated an exhaustive analysis which allowed to achieve significative advancements in defining the sodium uptake mechanism for pseudo-capacitive oxide-based anode material for sodium-ion batteries.
Vutetakis, David George. "Electrochemical oxidation of carbonaceous materials dispersed in molten carbonate /." The Ohio State University, 1985. http://rave.ohiolink.edu/etdc/view?acc_num=osu1487264603217609.
Повний текст джерелаArnaboldi, S. "CHIRAL ELECTROCHEMISTRY IN IONIC LIQUIDS." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/244316.
Повний текст джерелаRong, Yuanyang. "Intrinsically microporous polymer materials for electrodes and membranes." Thesis, University of Bath, 2017. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.720657.
Повний текст джерелаSingh, Kulveer. "Structure-function studies of the oxidoreductase bilirubin oxidase from Myrothecium verrucaria using an electrochemical quartz crystal microbalance with dissipation." Thesis, University of Oxford, 2014. http://ora.ox.ac.uk/objects/uuid:0376cc7e-f572-4e0c-96f0-43b0b4b91d99.
Повний текст джерелаVieira, Jocicler Claudio. "Estudo de interfases eletroquímicas envolvendo materiais metálicos de uso odontológico." Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/46/46132/tde-02022007-134525/.
Повний текст джерелаDifferent metal electrolytic interphases with relevance for dental prosthesis and implants were studied at 36,5 degrees Celsius by stationary electrochemical techniques. Two alloys, Au-Pt-Pd and Ni-Cr-Mo-Ti, were compared and in this case, EIS, SEM and EDS were also employed as techniques. The studies also included Ti-cp and Ag-Cu-Sn-Zn amalgam. It was studied the effect of adding NaF, citric acid (H3Cit) and bovine serum albumin (BSA) to NaCl medium. Ni-Cr-Mo-Ti alloy, developed to substitute Au-Pt-Pd alloy, presents a distinct behaviour from the last mentioned alloy, characterized by an irreproducible surface, corrosion potential situated at 200 mV to 500 mV more negative value, depending of the medium, and narrow or absence of passive range. Ti-cp is passive in all the potential range studied (2 V/SCE) in NaCl and NaCl+H3Cit media; in NaCl+NaF the passive range is narrower and it increases 100 mV in the presence of BSA. H3Cit breaks down the passive film deposited on the Ni-Cr-Mo-Ti and amalgam alloy surfaces. BSA exhibits distinct effects depending upon both the nature of the alloy and the media suggesting either physical adsorption either complex formation. Different kinds of polymers for fitting the metallic samples are discussed, such as teflon, epoxy resin and epoxy vinyl ester resin (EVER). The results suggest that the EVER polymer is the most recommendable for fitting dental materials.