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Dissertations / Theses on the topic 'Materials for positive electrode'

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Published: 28 June 2021
Last updated: 29 July 2025

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1

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 c
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2

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 Li2FeP2
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3

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 fluo
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4

Sun, Meiling. "Elaboration of novel sulfate based positive electrode materials for Li-ion batteries." Electronic Thesis or Diss., Paris 6, 2016. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2016PA066686.pdf.

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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 fluo
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5

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 Metallfluoridverbindun
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6

Laurita, Angelica. "Characterisation of the surface reactivity of Ni-rich positive electrode materials for Li-ion batteries." Thesis, Nantes Université, 2022. http://www.theses.fr/2022NANU4025.

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L’électrification des véhicules se base aujourd’hui sur l’utilisation de batteries Lithium-ion utilisant des oxydes lamellaires de nickel, manganèse et cobalt (NMC) comme matériaux d’électrode positive. Au niveau industriel, la production de matériaux riches en nickel est désormais privilégiée pour satisfaire la demande de meilleures autonomies de la batterie de la part des consommateurs. Cependant, ces matériaux sont affectés par un fort dégagement gazeux pendant le cyclage en batterie. Plusieurs études ont été conduites pour définir les principales causes de ce dégazage et trouver les meille
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7

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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8

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 struct
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9

Mohamed, Zakiah. "Relationships Among Structure, Magnetism and State of Charge in Positive Electrode Materials for Metal-Ion Batteries." Thesis, The University of Sydney, 2015. http://hdl.handle.net/2123/14438.

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Polyanionic framework materials containing 3d transition metals such as iron, cobalt and manganese are attractive candidates as electrodes in lithium and sodium ion batteries due to their thermal stability, long cycle life and environmental friendliness. LiFePO4 is already used in some commercial lithium ion batteries as a positive electrode material where these are key attributes, but it still has lower energy density and higher costs compared to the more commonly used LiCoO2. This thesis describes a combined physical properties and magnetic structures some of these materials, aimed at improv
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10

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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11

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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12

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 red
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13

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 be
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14

Jokar, Ali. "An inverse method for estimating the electrochemical and the thermophysical parameters of lithium-ion batteries with different positive electrode materials." Thèse, Université de Sherbrooke, 2017. http://hdl.handle.net/11143/11799.

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La sécurité de plusieurs systèmes électriques est fortement dépendante de la fiabilité de leur bloc-batterie à base de piles aux ions lithium (Li-ion). Par conséquent, ces batteries doivent être suivis et contrôlés par un système de gestion des batteries (BMS). Le BMS interagit avec toutes les composantes du bloc-batterie de façon à maintenir leur intégrité. La principale composante d’un BMS est un modèle représentant le comportement des piles Liion et capable de prédire ses différents points d’opération. Dans les industries de l’électronique et de l’automobile, le BMS repose habituelleme
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15

Zhao, Wenjiao [Verfasser], and H. J. [Akademischer Betreuer] Seifert. "Thermal Characterization of Lithium-ion Cells with Positive Electrode Materials $LiNi_xMn_0.8-xCo_0.2O_2 and their Components / Wenjiao Zhao ; Betreuer: H. J. Seifert." Karlsruhe : KIT-Bibliothek, 2021. http://d-nb.info/1238148034/34.

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16

Gabrielli, Giulio [Verfasser]. "Studies of high voltage LiNi0.5Mn1.5O4 as positive electrode material in lithium ion cells / Giulio Gabrielli." Ulm : Universität Ulm, 2017. http://d-nb.info/1124902651/34.

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17

Lemoine, Kévin. "Nouveaux matériaux fluorés d'électrodes positives à cations 3d mixtes pour batteries à ions lithium : Elaboration, caractérisation structurale et propriétés électrochimiques." Thesis, Le Mans, 2019. http://www.theses.fr/2019LEMA1030.

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Ce travail concerne l’application d'une stratégie de synthèse en deux étapes pour préparer de nouveaux matériaux fluorés à base de fer dans l’objectif de les tester en tant que composé actif d’électrodes positives pour batteries à ions lithium : élaboration d’un précurseur suivie d’un traitement thermique adéquat. L’étude porte dans un premier temps sur les fluorures hydratés 3D à valence mixte de fer, Fe2F5(H2O)2 de structure weberite inverse et Fe3F8(H2O)2. Par traitement thermique sous air, deux hydroxyfluorures sont stabilisés, FeF2.5(OH)0.5 de structure pyrochlore et FeF2.66(OH)0.34 de st
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18

Ukyo, Y., K. Horibuchi, H. Oka, et al. "Degradation analysis of a Ni-based layered positive-electrode active material cycled at elevated temperatures studied by scanning transmission electron microscopy and electron energy-loss spectroscopy." Elsevier, 2011. http://hdl.handle.net/2237/20821.

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19

Kifune, Koichi, Miho Fujita, Mitsuru Sano, Motoharu Saitoh, and Koh Takahashi. "Electrochemical and Structural Properties of a 4.7 V-Class LiNi0.5Mn1.5 O 4 Positive Electrode Material Prepared with a Self-Reaction Method." The Electrochemical Society, 2004. http://hdl.handle.net/2237/18424.

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20

Mortemard, de boisse Benoit. "Etudes structurales et électrochimiques des matériaux NaxMn1-yFeyO2 et NaNiO2 en tant qu’électrode positive de batteries Na-ion." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0370/document.

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Ce travail présente les études électrochimiques et structurales menées sur deux systèmes : P2/O3-NaxMn1-yFeyO2 et O’3-NaxNiO2 utilisés en tant que matériaux d’électrode positive pour batteries Na-ion.Concernant le système P2/O3-NaxMn1-yFeyO2, l’étude par diffraction des rayons X menée in situ pendantla charge de batteries a montré de nombreuses transitions structurales. Que leur structure soit de type P2ou O3, les matériaux présentent une phase distordue pour les taux d’intercalation (x) les plus élevés etune phase très peu ordonnée pour les taux d’intercalation les moins élevés. Entre ces deu
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21

Masoumi, Maryam [Verfasser], and Seifert H. [Akademischer Betreuer] J. "Thermochemical and electrochemical investigations of Li(Ni,Mn,Co)O$_2}$ (NMC) as positive electrode material for lithium-ion batteries / Maryam Masoumi ; Betreuer: H. J. Seifert." Karlsruhe : KIT-Bibliothek, 2020. http://d-nb.info/1223027961/34.

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22

Reynaud, Marine. "Elaboration de nouveaux matériaux à base de sulfates pour l'électrode positive des batteries à ions Li et Na." Phd thesis, Université de Picardie Jules Verne, 2013. http://tel.archives-ouvertes.fr/tel-01018912.

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Les prochaines générations de batteries à ions lithium et sodium seront basées sur le développement de nouveaux matériaux d'électrode positive durables, peu chers et sûrs. Dans ce but, nous avons exploré le monde des minéraux à la recherche de structures présentant les pré-requis pour l'insertion et la désinsertion d'ions alcalins. Nous avons alors entrepris l'étude de sulfates bimétalliques dérivés du minéral bloedite, ayant pour formule générale AxM(SO4)2*nH2O (A = Li, Na, M = métal de transition 3d, et n = 0, 4). Ces systèmes présentent une cristallochimie riche, montrant des transitions st
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23

Schmidt, Elisabeth. "Elaboration et caractérisation de couches minces amorphes d'oxysulfures de molybdène utilisables comme électrode positive dans des générateurs électrochimiques." Phd thesis, Université Sciences et Technologies - Bordeaux I, 1993. http://tel.archives-ouvertes.fr/tel-00134070.

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Des couches minces amorphes d'oxysulfures de molybdène, préparées par pulvérisation cathodique radiofréquence, ont ete caractérisées par spectroscopie AUGER, RBS, microsonde électronique, diffraction des rayons X et diffraction électronique. Une étude XPS a permis de déterminer le degré d'oxydation et l'environnement des différents éléments en fonction de la composition des couches minces. Les propriétés électrochimiques de ces nouveaux matériaux ont été déterminees. Ils ont été utilisés comme électrode positive dans des générateurs électrochimiques au lithium. Un grand nombre de cycles déchar
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24

Oney, Gozde. "L'ordre des métaux de transition dans la phase spinelle LiNi0,5-xMn1,5+xO4 à haut potentiel : caractérisation multi-échelle jusqu'au nanomètre." Electronic Thesis or Diss., Bordeaux, 2023. http://www.theses.fr/2023BORD0457.

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Les performances de la phase spinelle LiNi0,5-xMn1,5+xO4 (LNMO) dans les batteries Li-ion dépendent fortement de ses conditions de synthèse, de la stœchiométrie Ni/Mn et du degré d'ordre des métaux de transition. La structure cristalline de LNMO peut être décrite dans les groupes d'espace Fd-3m ou P4332, en fonction de l'étendue de cet ordre. Comprendre l'impact de ces propriétés structurales sur les performances électrochimiques est difficile en raison de la nature interdépendante de chaque paramètre et de la résolution spatiale limitée des techniques de caractérisation courantes. Dans cette
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25

Řehák, Petr. "Studium vlivu modifikace separátorů na vlastnosti Li-S akumulátorů." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2021. http://www.nusl.cz/ntk/nusl-442444.

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This thesis deals with the development and current issues of Li-ion and Li-S accumulators, especially the separators. In the theoretical part is described history of Li-ion batteries, their properties and materials for the positive electrode. Li-S batteries and their problems are also described in this diploma thesis. In the practical part, electrochemical methods were described, and several separator samples with various modifications were created. These samples were then photographed using an SEM electron microscope and evaluated using electrochemical methods.
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Minart, Gaël. "Étude de l'influence de la morphologie, de modifications de surface et de la composition de matériaux d'électrode positive pour batteries Na-ion." Electronic Thesis or Diss., Bordeaux, 2024. http://www.theses.fr/2024BORD0340.

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Cette thèse rapporte des travaux portant sur l'étude de l'influence de la morphologie, de la modification de surface et de la composition de particules de matériaux d'électrodes positives de batteries Na-ion sur leurs performances électrochimiques. Dans un premier temps, trois matériaux de formules Na3V2(PO4)FO2 possédant trois morphologies différentes ont été synthétisés par voie topochimique en milieu liquide ionique. La morphologie affichant les meilleures performances a ensuite été choisie pour y appliquer un revêtement conducteur en carbone par traitement thermique à partir de la couche d
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Foltová, Anežka. "Vliv tlaku použitého při výrobě elektrod na jejich výsledné vlastnosti." Master's thesis, Vysoké učení technické v Brně. Fakulta elektrotechniky a komunikačních technologií, 2017. http://www.nusl.cz/ntk/nusl-319628.

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The aim of this work is to describe final properties of the electrodes based on the amount of pressure used during its production. In the theoretical part of this work, secondary electrochemical accumulators are described, with the focus on Li-ion accumulators. In the main part of this work, the production of Li-ion accumulators, with usage of different pressures during its production is described. In the final part of this work, the examination of these created cells for the classification of the optimal production pressure is described.
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Tavener, P. "Electron spectroscopy of electrode materials." Thesis, University of Oxford, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.370304.

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Xiao, Lei. "Nano-electrode materials for electroanalysis." Thesis, University of Oxford, 2010. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.526413.

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Thomas, Glyn Rees. "Counter electrode materials for electrochromic windows." Thesis, University of Southampton, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.261513.

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31

Hao, Yong. "Sulfur Based Electrode Materials For Secondary Batteries." FIU Digital Commons, 2016. http://digitalcommons.fiu.edu/etd/2582.

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Developing next generation secondary batteries has attracted much attention in recent years due to the increasing demand of high energy and high power density energy storage for portable electronics, electric vehicles and renewable sources of energy. This dissertation investigates sulfur based advanced electrode materials in Lithium/Sodium batteries. The electrochemical performances of the electrode materials have been enhanced due to their unique nano structures as well as the formation of novel composites. First, a nitrogen-doped graphene nanosheets/sulfur (NGNSs/S) composite was synthesized
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Malmberg, Helena. "Nanoscientific investigations of electrode materials for supercapacitors." Doctoral thesis, Stockholm : Kemiteknik, Kungliga Tekniska högskolan, 2007. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-4508.

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Friedrich, Jens Maximilian. "Characterisation of electrode materials for electrochemical reactors." Thesis, University of Southampton, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.435749.

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34

Lazzari, Mariachiara <1978&gt. "Electrode Materials for Ionic Liquid Based-Supercapacitors." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2718/1/Lazzari_Mariachiara_Tesi.pdf.

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The development of safe, high energy and power electrochemical energy-conversion systems can be a response to the worldwide demand for a clean and low-fuel-consuming transport. This thesis work, starting from a basic studies on the ionic liquid (IL) electrolytes and carbon electrodes and concluding with tests on large-size IL-based supercapacitor prototypes demonstrated that the IL-based asymmetric configuration (AEDLCs) is a powerful strategy to develop safe, high-energy supercapacitors that might compete with lithium-ion batteries in power assist-hybrid electric vehicles (HEVs). The increase
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Lazzari, Mariachiara <1978&gt. "Electrode Materials for Ionic Liquid Based-Supercapacitors." Doctoral thesis, Alma Mater Studiorum - Università di Bologna, 2010. http://amsdottorato.unibo.it/2718/.

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The development of safe, high energy and power electrochemical energy-conversion systems can be a response to the worldwide demand for a clean and low-fuel-consuming transport. This thesis work, starting from a basic studies on the ionic liquid (IL) electrolytes and carbon electrodes and concluding with tests on large-size IL-based supercapacitor prototypes demonstrated that the IL-based asymmetric configuration (AEDLCs) is a powerful strategy to develop safe, high-energy supercapacitors that might compete with lithium-ion batteries in power assist-hybrid electric vehicles (HEVs). The increase
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36

Blanchard, Rémi. "Redox shuttle and positive electrode protection for Li-O2 systems." Thesis, Université Grenoble Alpes (ComUE), 2017. http://www.theses.fr/2017GREAI098/document.

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Les travaux de cette thèse focalisent sur la résolution de deux problèmes majeurs des électrodes positives de systèmes Li-O2, dus à la nature du produit de décharge formé pendant la réaction de réduction de l'oxygène, en milieux Li+ : Lithium peroxyde (Li2O2). Le premier problème est lié au processus de formation de ce dernier (étapes successives de nucléation électrochimiques et de dismutation chimique d'un intermédiaire : le superoxide de lithium), qui conduit à la formation de très grosses particules de peroxyde lithium à la surface de l'électrode. Du fait de leurs taille et de leur résisti
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Yamada, Izumi. "Studies on Litihum Ion Transfer at Positive-electrode/Electrolyte Interface." 京都大学 (Kyoto University), 2007. http://hdl.handle.net/2433/77798.

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Lao, Zhuo Jin. "Metal oxides as electrode materials for electrochemical capacitors." Access electronically, 2006. http://www.library.uow.edu.au/adt-NWU/public/adt-NWU20060726.101327/index.html.

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Berrigan, John Daniel. "Biomimetic and synthetic syntheses of nanostructured electrode materials." Diss., Georgia Institute of Technology, 2012. http://hdl.handle.net/1853/53143.

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The scalable syntheses of functional, porous nanostructures with tunable three-dimensional morphologies is a significant challenge with potential applications in chemical, electrical, electrochemical, optical, photochemical, and biochemical devices. As a result, several bio-enabled and synthetic approaches are explored in this work (with an emphasis on peptide-enabled deposition) for the generation of aligned nanotubes of nanostructured titania for application as electrodes in dye-sensitized solar cells and biofuel cells. As part of this work, peptide-enabled deposition was used to deposit c
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40

Dijk, Nicholas van. "Rapid prototyping of electrode materials for fuel cells." Thesis, Loughborough University, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.443957.

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41

Cooper, Benjamin D. "Electrode materials for the electrolysis of metal oxides." Thesis, Massachusetts Institute of Technology, 2006. http://hdl.handle.net/1721.1/35072.

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Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, June 2006.<br>"May 2006."<br>Includes bibliographical references (leaves 35-36).<br>Carbon, tungsten, platinum, and iridium were examined as candidate anode materials for an electrolytic cell. The materials were pre-selected to endure high process temperatures and were characterized for inertness and high current density during electrolysis using voltammometric techniques. Inertness is viewable through current discrepancies dependent on voltage scan direction at low voltage, consumption of current
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Lyness, Christopher. "Novel lithium-ion host materials for electrode applications." Thesis, University of St Andrews, 2011. http://hdl.handle.net/10023/1921.

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Two novel lithium host materials were investigated using structural and electrochemical analysis; the cathode material Li₂CoSiO₄ and the LiMO₂ class of anodes (where M is a transition metal ion). Li₂CoSiO₄ materials were produced utilising a combination of solid state and hydrothermal synthesis conditions. Three Li₂CoSiO₄ polymorphs were synthesised; β[subscript(I)], β[subscript(II)] and γ₀. The Li₂CoSiO₄ polymorphs formed structures based around a distorted Li₃PO₄ structure. The β[subscript(II)] material was indexed to a Pmn2₁ space group, the β[subscript(I)] polymorph to Pbn2₁ and the γ₀ mat
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43

Li, Da. "New advanced electrode materials for lithium-ion battery." Thesis, University of St Andrews, 2018. http://hdl.handle.net/10023/15601.

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This thesis includes five main studies/ first, in order to enhance the conductivity of LiTi204, a new doping strategy is used and LiTi204−xCx ramsdellite is successfully fabricated. It is found that unit cell parameters a and b decline while c increases with more carbon inserted. The conductivity of LiTi204−xCx increases with more carbon insertion. Material with more carbon shows better reversibility and lower electrochemical polarization observed from potentiostatic curve. The material has better retention rate and rate ability with more carbon substitute doped. LiTi203.925C0.0375 has 151 mAh
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44

Aricci, G. "ELECTROCHEMICAL TECHNOLOGIES: ADVANCED ELECTRODE MATERIALS FOR ENVIRONMENTAL APPLICATION." Doctoral thesis, Università degli Studi di Milano, 2010. http://hdl.handle.net/2434/150133.

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An investigation on a new class on electrocatalytic materials for the electroreduction of organic halides is presented and discussed. The electrocatalysts are based on silver nanoparticles (Ag_NP and Ag_NC), ad hoc synthesised by two different synthetic path (Polyol assisted and Wet chemical reduction). The obtained nanoparticles are then supported on carbon black (pre-treated or untreated) (20% or 10% loading) for further characterisation and use. The electrocatalytic properties of the Ag_NP/carbon and Ag_NC/carbon composites towards the dehalogenation of halocompounds are tested by cyclic
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45

Pifferi, V. "ADVANCED MATERIALS FOR ELECTRODE MODIFICATION IN TRACE ELECTROANALYSIS." Doctoral thesis, Università degli Studi di Milano, 2014. http://hdl.handle.net/2434/229250.

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Trace analysis [1] (i.e. the analysis of analytes in concentration low enough to cause difficulty, generally under 1 ppm) albeit very challenging, in the last years has shown a tremendous growth, prompted by the urgent need of many International Organizations (US Environmental Protection Agency EPA, U.S. Food and Drug Administration FDA, European Food Safety Authority EFSA, World Health Organization WHO) looking for new analytical techniques for the detection of different molecules in different and increasingly more complex matrixes. Trace analysis is therefore a basic and fundamental techniq
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46

Gillard, 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.

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47

Minett, Michael Geoffrey. "New composite insertion electrode materials for secondary lithium cells." Thesis, University of Salford, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327916.

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48

Perkins, Mark James. "Carbon-based negative electrode materials for rechargeable lithium batteries." Thesis, University of Southampton, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.326801.

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49

Du, Dongwei. "Development of advanced electrode materials for high-performance supercapacitors." Thesis, University of Warwick, 2018. http://wrap.warwick.ac.uk/108878/.

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The demand for high-performance electrochemical energy storage devices is ever-growing as they are critical components for portable electronics, electric vehicles, and efficient storage media for energy from renewable sources. Electrochemical capacitors (also called supercapacitors) are emerging as one of the most promising candidates due to their rapid charge rate, high power density, good rate capability and excellent lifespan. However, their usage is significantly limited by the disadvantages of low energy density. The main aim of this work is to develop advanced electrode materials for sup
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50

SARTO, FRANCESCA. "Electrochemical characterization of electrode materials for hydrogen-energy applications." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2014. http://hdl.handle.net/2108/203430.

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