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Dissertations / Theses on the topic 'Cathode composite'

Author: Grafiati

Published: 4 June 2021

Last updated: 22 June 2024

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1

Bajic, Stevan. "Non-metallic cold-cathode electron emission from composite metal-insulator microstructures." Thesis, Aston University, 1989. http://publications.aston.ac.uk/8063/.

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A detailed investigation has been undertaken into a field-induced electron emission (FIEE) mechanism that occurs at microscopically localised `sites' on uncoated, dielectric-coated and composite-coated metallic cathodes. An optical imaging technique has been used to observe and characterize the spatial and temporal behaviour of the populations of emission sites on these cathodes under various experimental conditions, e.g. pulsed-fields, gas environment etc. This study has shown that, for applied fields of 20MVm^-1, thin dielectric (750AA) and composite metal-insulator (MI) overlayers result in

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2

Randau, Simon [Verfasser]. "Benchmarking of SSB, reference cells and optimization of the cathode composite / Simon Randau." Gießen : Universitätsbibliothek, 2021. http://d-nb.info/1236385675/34.

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3

Sifuba, Sabelo. "Electrochemically enhanced ferric lithium manganese phosphate / multi-walled carbon nanotube, as a possible composite cathode material for lithium ion battery." University of the Western Cape, 2019. http://hdl.handle.net/11394/7077.

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>Magister Scientiae - MSc<br>Lithium iron manganese phosphate (LiFe0.5Mn0.5PO4), is a promising, low cost and high energy density (700 Wh/kg) cathode material with high theoretical capacity and high operating voltage of 4.1 V vs. Li/Li+, which falls within the electrochemical stability window of conventional electrolyte solutions. However, a key problem prohibiting it from large scale commercialization is its severe capacity fading during cycling. The improvement of its electrochemical cycling stability is greatly attributed to the suppression of Jahn-Teller distortion at the surface of the Li

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4

Williams, Robert Earl Jr. "Simulation and Characterization of Cathode Reactions in Solid Oxide Fuel Cells." Diss., Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/16309.

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In this study, we have developed a dense La0.85Sr0.15MnO3-δ (LSM) Ce0.9Gd0.1O1.95 (GDC) composite electrode system for studying the surface modification of cathodes. The LSM and GDC grains in the composite were well defined and distinguished using energy dispersive x-ray (EDX) analysis. The specific three-phase boundary (TPB) length per unit electrode surface area was systematically controlled by adjusting the LSM to GDC volume ratio of the composite from 40% up to 70%. The TPB length for each tested sample was determined through stereological techniques and used to correlate the cell perfor

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5

Celikbilek, Ozden. "Optimisation de la cathode pour pile à combustible à oxyde électrolyte solide : approches expérimentale et numérique." Thesis, Université Grenoble Alpes (ComUE), 2016. http://www.theses.fr/2016GREAI071/document.

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Comprendre, contrôler et optimiser le mécanisme de la réaction de réduction de l’oxygène à la cathode, cette démarche devient une nécessité pour améliorer les dispositifs de conversion d'énergie de haute performance tels que les piles à combustible à oxyde électrolyte solide (PAC). Des films poreux à conduction mixte, ionique et électronique (MIEC) et leurs composites comprenant un conducteur ionique offrent des propriétés uniques. Cependant, la corrélation des propriétés intrinsèques des composants d'électrodes aux caractéristiques microstructurales reste une tâche difficile. Dans le cadre de

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Hlongwa, Ntuthuko Wonderboy. "Nanoparticles-infused lithium manganese phosphate coated with magnesium-gold composite thin film - a possible novel material for lithium ion battery olivine cathode." University of the Western Cape, 2014. http://hdl.handle.net/11394/4467.

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>Magister Scientiae - MSc<br>Architecturally enhanced electrode materials for lithium ion batteries (LIB) with permeable morphologies have received broad research interests over the past years for their promising properties. However, literature based on modified porous nanoparticles of lithium manganese phosphate (LiMnPO₄) is meagre. The goal of this project is to explore lithium manganese phosphate (LiMnPO₄) nanoparticles and enhance its energy and power density through surface treatment with transition metal nanoparticles. Nanostructured materials offer advantages of a large surface to volum

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7

Ikpo, Chinwe Oluchi. "Development of high performance composite lithium ion battery cathode systems with carbon nanotubes functionalised with bimetallic inorganic nanocrystal alloys." Thesis, University of Western Cape, 2011. http://hdl.handle.net/11394/3797.

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Philosophiae Doctor - PhD<br>Lithium ion cathode systems based on composites of lithium iron phosphate (LiFePO₄), iron-cobalt-derivatised carbon nanotubes (FeCo-CNT) and polyaniline (PA) nanomaterials were developed. The FeCo-functionalised CNTs were obtained through in-situ reductive precipitation of iron (II) sulfate heptahydrate (FeSO₄.7H₂O) and cobalt (II) chloride hexahydrate (CoCl₂.6H₂O) within a CNT suspension via sodium borohydrate (NaBH₄) reduction protocol. Results from high Resolution Transmission Electron Microscopy (HRTEM) and Scanning Electron Microscopy (SEM) showed the successf

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8

Mountadir, Soukaina. "Élaboration d'une pile à combustible à oxyde solide basse température à électrolyte bicouche." Electronic Thesis or Diss., Centrale Lille Institut, 2023. http://www.theses.fr/2023CLIL0019.

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Les propriétés de conduction de la zircone stabilisée à l’yttrium (YSZ) imposent des températures de fonctionnement supérieures ou égales à 700 °C pour les piles à combustible à oxyde solide (SOFC, Solid Oxyde Fuel Cell en anglais). De très bonnes performances ayant été reportées dans la littérature sur les cellules à électrolytes bicouches à base de cérine dopée au gadolinium (GDC) et d’oxyde de bismuth partiellement substitué à l’erbium, dans cette étude, nous avons repris ce concept dans l’objectif d’élaborer une cellule complète. Dans un premier temps, les conditions de dépôt d'une couche

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9

Roller, Justin. "Low platinum electrodes for proton exchange fuel cells manufactures by reactive spray deposition technology." Thesis, University of British Columbia, 2009. http://hdl.handle.net/2429/4458.

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Reactive spray deposition technology (RSDT) is a method of depositing films or producing nanopowders through combustion of metal-organic compounds dissolved in a solvent. This technology produces powders of controllable size and quality by changing process parameters to control the stoichiometry of the final product. This results in a low-cost, continuous production method suitable for producing a wide range of fuel cell related catalyst films or powders. In this work, the system is modified for direct deposition of both unsupported and carbon supported layers on proton exchange membrane (PEM)

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10

An, Ke. "Mechanical Properties and Electrochemical Durability of Solid Oxide Fuel Cells." Diss., Virginia Tech, 2003. http://hdl.handle.net/10919/11088.

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The mechanical properties of unaged and aged constituent materials for solid oxide fuel cells were evaluated using microindentation, plate tensile, four-point bend, ball on ring and pressure on ring tests. The Vickers hardness of the anode, interconnect and electrolyte was determined before and after 1000 hours aging at 1000 oC in air. The fracture toughness KIC was found for the electrolyte materials. Finite element analysis (FEA) was validated and used to calculate the stress distribution and peak stress for the biaxial strength test. A Weibull analysis was carried out on the test/FEA-predic

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11

Hierso, Jessie. "Synthèse et caractérisation d'une nouvelle architecture de cathode pour pile à combustible fonctionnant aux températures intermédiaires (ITSFOC)." Phd thesis, Université Pierre et Marie Curie - Paris VI, 2010. http://tel.archives-ouvertes.fr/tel-00587072.

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Cette thèse présente deux axes de recherches pour améliorer les performances de la cathode d'une pile SOFC. 1) Des films minces mésostructurés de CGO ont été réalisés par le procédé sol-gel, incluant l'utilisation de copolymères à bloc, associé à du dip-coating. Ce type de film, de porosité contrôlée, a ensuite été intégré à l'interface cathodique d'un dispositif complet. L'efficacité de ces films a été testée en pile complète et se traduit par une diminution de la chute ohmique dans la pile, améliorant ainsi ses performances. 2) Une nouvelle architecture de cathode composite LSC-CGO a ensuite

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Wilkinson, Lucas T. "Silver-perovskite composite materials for SOFC cathode-interconnect contact a thesis presented to the faculty of the Graduate School, Tennessee Technological University /." Click to access online, 2009. http://proquest.umi.com/pqdweb?index=23&sid=1&srchmode=1&vinst=PROD&fmt=6&startpage=-1&clientid=28564&vname=PQD&RQT=309&did=1760523391&scaling=FULL&ts=1250866302&vtype=PQD&rqt=309&TS=1250866321&clientId=28564.

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Deka, Dhruba Jyoti. "Development of Cathode Catalysts for the Production of Synthesis Gas and Ammonia in Solid Oxide Electrolysis Cells." The Ohio State University, 2020. http://rave.ohiolink.edu/etdc/view?acc_num=osu1588693027481087.

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Eberle, Anna-Marietta [Verfasser], Hubert A. [Akademischer Betreuer] [Gutachter] Gasteiger, and Thomas F. [Gutachter] Fässler. "The influence of different parameters on the discharge capacity and cycling performance of an S/C-composite cathode / Anna-Marietta Eberle ; Gutachter: Thomas F. Fässler, Hubert A. Gasteiger ; Betreuer: Hubert A. Gasteiger." München : Universitätsbibliothek der TU München, 2017. http://d-nb.info/1131253809/34.

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15

Olivetti, Elsa A. "Composite cathodes for lithium rechargeable batteries." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39554.

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Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 2007.<br>Includes bibliographical references.<br>The utility of incorporating continuous, nanoscale vanadium oxide phases within preferred domains of self-organizing copolymers was investigated towards the fabrication of composite, nanoarchitectured electrode materials for solid-state rechargeable batteries. In situ growth of cathodic phases within ion-conducting copolymer domains was explored as a means to control morphology and to increase the surface-area-to-volume ratio, thereby increasing t

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Токарева, Е. С., та E. S. Tokareva. "Получение и функциональные свойства сложнооксидных материалов на основе Ca3Co4O9+δ как перспективных катодов для среднетемпературных ТОТЭ : магистерская диссертация". Master's thesis, б. и, 2021. http://hdl.handle.net/10995/99985.

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Объектами исследования настоящей работы являются катодные материалы на основе сложного оксида Сa3Co4O9+δ. Цель работы – апробация материалов на основе Сa3Co4O9+δ, которые могут быть использованы в качестве катодов для среднетемпературных твердооксидных топливных элементов с протон-проводящими электролитами BaCe0.5Zr0.3Y0.1Yb0.1O3- и BaCe0.7Zr0.1Y0.1Yb0.1O3-. Методом пиролиза цитрат-солевых композиций проведен синтез сложных оксидов Сa3Co4O9+δ, Ca3Co4-xCuxO9 (х = 0.05; 0.1; 0.15; 0.2), BaCe0.5Zr0.3Y0.1Yb0.1O3-δ и BaCe0.7Zr0.1Y0.1Yb0.1O3-. При помощи комплекса современных методов исследования

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17

Chiba, Rubens. "Síntese, processamento e caracterização das meia-células de óxido sólido catodo/eletrólito de manganito de lantânio dopado com estrôncio/zircônia estabilizada com ítria." Universidade de São Paulo, 2010. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-29082011-141252/.

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Os filmes cerâmicos de manganito de lantânio dopado com estrôncio (LSM) e de manganito de lantânio dopado com estrôncio/zircônia estabilizada com ítria (LSM/YSZ) são utilizados como catodos das células a combustível de óxido sólido de temperatura alta (CaCOSTA). Estes filmes cerâmicos porosos foram depositados sobre o substrato cerâmico denso de YSZ, utilizado como eletrólito, componente estrutural do módulo, assim conferindo uma configuração de meia-célula denominada auto-suporte. O estudo da meia-célula é fundamental, pois na interface catodo/eletrólito ocorre a reação de redução do oxigênio

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Veillere, Amélie Aurélie Mylène. "Drains thermiques adaptatifs : cuivre allié / Fibre de Carbone." Thesis, Bordeaux 1, 2009. http://www.theses.fr/2009BOR13835/document.

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Dans le domaine de l'électronique de puissance, la gestion thermique de l'intégration des puces en silicium au sein du système global constitue un problème clé. La chaleur dissipée par les composants électriques est évacuée vers l’extérieur à travers un drain thermique, généralement en cuivre, qui est brasé sur le substrat céramique. Cette étude est consacrée à l'élaboration de drains thermiques adaptatifs en matériaux composites cuivre allié/fibres de carbone (FC) qui combinent une bonne conductivité thermique et un CTE proche de celui du substrat. Dans ce type de matériau, la liaison interfa

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Koç, Tuncay. "In search of the best solid electrolyte-layered oxide pair in all-solid-state batteries." Electronic Thesis or Diss., Sorbonne université, 2022. http://www.theses.fr/2022SORUS535.

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Les batteries à l'état solide (ASSB) qui reposent sur l'utilisation d'électrolytes solides (SE) à conductivité ionique élevée sont le Saint-Graal de la future technologie des batteries, car elles pourraient théoriquement permettre une augmentation de près de 70 et 40 % des densités d'énergie volumétrique (Wh/l) et gravimétrique (Wh/kg), respectivement, ainsi qu'une sécurité accrue par rapport à la technologie des batteries au lithium-ion. À cette fin, la dernière décennie a vu le développement des ASSB, principalement grâce à des SE à base de sulfure, en raison de leurs propriétés intrinsèques

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Sivasundram, Gopiraj. "Composite cathodes for intermediate temperature solid oxide fuel cells." Thesis, Imperial College London, 2006. http://hdl.handle.net/10044/1/11518.

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21

Jorgensen, Mette Juhl. "Lanthanum manganate based cathodes for solid oxide fuel cells." Thesis, Keele University, 2000. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.343243.

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22

Yung, Hoi. "Optimisation of composite cathodes for intermediate temperature solid oxide fuel cells." Thesis, Imperial College London, 2006. http://hdl.handle.net/10044/1/11338.

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23

Quemin, Elisa. "Exploring solid-solid interfaces in Li6PS5Cl-based cathode composites for all solid state batteries." Electronic Thesis or Diss., Sorbonne université, 2023. http://www.theses.fr/2023SORUS501.

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Les technologies de stockage énergétiques jouent un rôle crucial en accommodant le caractère intermittent des énergies renouvelable. Actuellement, les batteries lithium-ion prédominent le marché des appareils portables. Cependant, pour les véhicules électriques, des avancées sont nécessaires en termes de sécurité et de densité énergétique, conduisant à l'exploration de nouvelles technologies de batterie, notamment les batteries tout-solide. Cette thèse se concentre sur les obstacles entravant l'application pratique de ces batteries tout-solide, en mettant particulièrement en lumière le rôle de

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Dörfler, Susanne, Markus Hagen, Holger Althues, Jens Tübke, Stefan Kaskel, and Michael J. Hoffmann. "High capacity vertical aligned carbon nanotube/sulfur composite cathodes for lithium–sulfur batteries." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2014. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-138906.

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Binder free vertical aligned (VA) CNT/sulfur composite electrodes with high sulfur loadings up to 70 wt% were synthesized delivering discharge capacities higher than 800 mAh g−1 of the total composite electrode mass<br>Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich

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Dörfler, Susanne, Markus Hagen, Holger Althues, Jens Tübke, Stefan Kaskel, and Michael J. Hoffmann. "High capacity vertical aligned carbon nanotube/sulfur composite cathodes for lithium–sulfur batteries." Royal Society of Chemistry, 2012. https://tud.qucosa.de/id/qucosa%3A27791.

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Binder free vertical aligned (VA) CNT/sulfur composite electrodes with high sulfur loadings up to 70 wt% were synthesized delivering discharge capacities higher than 800 mAh g−1 of the total composite electrode mass.<br>Dieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG-geförderten) Allianz- bzw. Nationallizenz frei zugänglich.

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Love, Corey T. "Cathodic disbondment resistance with reactive ethylene terpolymer blends and composite coatings." Diss., Connect to a 24 p. preview or request complete full text in PDF format. Access restricted to UC campuses, 2008. http://wwwlib.umi.com/cr/ucsd/fullcit?p3292000.

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Thesis (Ph. D.)--University of California, San Diego, 2008.<br>Title from first page of PDF file (viewed June 3, 2008). Available via ProQuest Digital Dissertations. Vita. Includes bibliographical references.

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Jiang, Shu-You, та 江書佑. "Fabrication of Ce0.85Y0.15O2-θ-Sm0.5Sr0.5Co0.9Ni0.1O3-δ composite cathode". Thesis, 2011. http://ndltd.ncl.edu.tw/handle/94588193451759940843.

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碩士<br>義守大學<br>材料科學與工程學系碩士班<br>99<br>This study attempted to replace Co in the Sm0.5Sr0.5CoO3-δ (SSC) with Ni and prepared Sm0.5Sr0.5Co1-xNixO3-δ (SSCN) cathode. In literature, the electrode materials containing Ni usually had better conductivity; on the other hand, the addition of Ni may reduce the TEC value of SSC to match that of electrolytes. We used the Pechini method to synthesize the SSCN with the different Ni contents and explored the relationship between microstructure and conductivity. At first, Ce0.85Y0.15O2-θ (CYO) powders were prepared by urea hydrolysis. Subsequently, CYO powders

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Zhang, Yongguang. "Sulfur based Composite Cathode Materials for Rechargeable Lithium Batteries." Thesis, 2013. http://hdl.handle.net/10012/7769.

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Lithium-ion batteries are leading the path for the power sources for various portable applications, such as laptops and cellular phones, which is due to their relatively high energy density, stable and long cycle life. However, the cost, safety and toxicity issues are restricting the wider application of early generations of lithium-ion batteries. Recently, cheaper and less toxic cathode materials, such as LiFePO₄ and a wide range of derivatives of LiMn₂O₄, have been successfully developed and commercialized. Furthermore, cathode material candidates, such as LiCoPO₄, which present a high redox

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Chung, Pao-Chia, and 鍾嘉寶. "Preparation of LiFePO4 Composite Cathode Material and Performance Analysis." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/31716386724887233983.

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碩士<br>國立新竹教育大學<br>應用科學系碩士班<br>99<br>In this project, we use ferrous sulfate / hydrogen peroxide and phosphoric acid / ammonia as the starting materials to produce iron phosphate precipitates under pH value in 2. After mixing with lithium carbonate in a certain percentage, the precursors were sintered at 700℃ in nitrogen. Then we obtained the crystal-like good olivine lithium iron phosphate. We also added different dispersants / iron phosphate coating agent in the precipitation process, to study the influence of electric properties of products. The results indicated: the selected dispersant,

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Hsu, Kuei-Feng, and 徐貴鳳. "Study on Olivine Structural LiFePO4/C Composite Cathode Material." Thesis, 2005. http://ndltd.ncl.edu.tw/handle/22548598064448386968.

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博士<br>國立成功大學<br>化學工程學系碩博士班<br>93<br>Abstract The main objective of this work is to develop a low cost process for the synthesis of LiFePO4/carbon composite cathode materials. The LiFePO4/carbon composite cathode materials were successfully synthesized by a developed sol–gel process. The citric acid in the developed sol–gel process plays the role not only as a complexing agent but also as a carbon source, which improves the conductivity of the composites and hinders the growth of LiFePO4 particles. The nano-sized LiFePO4 particles without the impurity phase were successfully synthesized. The g

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Li, Jing. "Development of sulfur-polyacrylonitrile/graphene composite cathode for lithium batteries." Thesis, 2013. http://hdl.handle.net/10012/7501.

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Rechargeable lithium sulfur (Li-S) batteries are potentially safe, environmentally friendly and economical alternative energy storage systems that can potentially be combined with renewable sources including wind solar and wave energy. Sulfur has a high theoretical specific capacity of ~1680 mAh/g, attainable through the reversible redox reaction denoted as S8+16Li ↔8Li¬2S, which yields an average cell voltage of ~2.2 V. However, two detrimental factors prevent the achievement of the full potential of the Li-S batteries. First, the poor electrical/ionic conductivity of elemental sulfur and Li2

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Cheng, Chi-Ju, and 鄭季汝. "The best Process of Composite Cathode of Li-ion Batteries." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/23069697713985577335.

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碩士<br>國立交通大學<br>理學院應用科技學程<br>102<br>The high power, high safety, and high energy density are the key to the popularization and application of lithium batteries for the next generation 3C integrated products (intelligent mobile phones, tablet computers) and high power products (electric vehicles, hybrid electric vehicles, electric scooters, intelligent robots, energy storage systems for renewable energy and grid applications). In order to meet these requirements, the whole world has been actively involved in technology development and innovation of lithium battery materials. Currently, the high

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Yu-FanChang and 張宇帆. "Electrochemical impedance characteristics of dual-conduction composite cathode for IT-SOFC." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/e666e9.

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碩士<br>國立成功大學<br>材料科學及工程學系<br>103<br>Lanthanum-strontium manganite (LSM) was the classic cathode material for SOFCs due to its high stability in oxidizing atmospheres, and sufficient electrical conductivity at high temperature (~200S/cm at 800℃). However, insufficient ion conductivity of LSM restricted its oxygen reduction reaction (ORR) to the cathode/electrolyte interface where consist of electronic conductor, ionic conductor, and gas phase (Triple phase boundary, TPB). Several researchers have reported a method to significantly lower cathode polarization resistance (RP) by introducing ionic

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Yun-JieChang and 張雲傑. "Fabrication of Macroporous LSM/YSB Composite Cathode Derived from PS Microspheres." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/86331925166704262347.

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碩士<br>國立成功大學<br>材料科學及工程學系<br>102<br>The intermediate temperature solid oxide fuel cells (IT-SOFC) have many advantages such as, high efficiency, no low pollution, no noise, etc among several advanced energy technologies. However, the performance of IT-SOFC is highly dependent on the polarization resistance of cathode. In the structure of SOFC, ordered porous structure will enhance the transport of gas and then facilitate the electrochemical reaction to improve the resistance of cathode. In this study, polystyrene (PS) microspheres have been used as templates to obtain desired 3-dimensionally o

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Yu-YaLin and 林裕雅. "The Durability of Surfactant-Directed Polypyrrole/Carbon Composite in PEMFC Cathode." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/75197165633115213837.

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Chen, Mao-Sung, and 陳懋松. "Preparation and Characterization of Composite LiFePO4/Li3V2(PO4)3 cathode materials." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/06286460738429865436.

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博士<br>大同大學<br>材料工程學系(所)<br>101<br>To promote the cathode material performances of lithium ion batteries, V-substituted LiFePO4 (LiFe1-xVxPO4, 0≤x≤0.10 and LiFe1-3y/2VyPO4, 0≤y≤0.05), Fe-substituted Li3V2(PO4)3 (Li3V2-yFey(PO4)3, 0≤y≤0.06), and LFVP/LVFP (LiFe0.97V0.02PO4/Li3V1.95Fe0.05(PO4)3) composite have been synthesized via a solution route in this study. These materials are characterized by ICP-OES, XRD and Rietveld methods. The oxidation states of the doped ions are examined by XAS. The morphology and the microstructure of the as-prepared powders are investigated by FE-SEM and FE-TEM. Th

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LUO, SIN-PING, and 羅欣萍. "Preparation of composite polymer membrane and Li3V2(PO4)3/C composite cathode material and their properties characterization." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/21818632864347688404.

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碩士<br>明志科技大學<br>化學工程系碩士班<br>104<br>This work was carried out to prepare two composite materials; the first one is composite polymer membrane consisted of thermoplastic polyurethane (denoted as TPU) and poly(ethylene terephthalate (donated as PET) via electrospinning technique; the second one is Li3V2(PO4)3 (donated as LVP) cathode material with NASICON structure vis a sol-gel method. By addition of 1-3wt.% graphene oxide into LVP cathode material was performed in order to enhance their electrochemical performances. The physical/chemical properties for above as-prepared composite materials were

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Chen, Yi Wen Wang Ben. "Nanotube and nanofiber buckypaper cold cathode illumination experimental investigation /." 2006. http://etd.lib.fsu.edu/theses/available/etd-07102006-161808.

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Thesis (M.S.)--Florida State University, 2006.<br>Advisor: Ben Wang, Florida State University, College of Engineering, Dept. of Industrial Engineering. Title and description from dissertation home page (viewed Sept. 22, 2006). Document formatted into pages; contains xii, 93 pages. Includes bibliographical references.

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Kung, Shu-Hsien, and 龔書賢. "Preparation of Li3V2(PO4)3/C Cathode Composite Materials and Electrochemical Studies." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/d4vsve.

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碩士<br>明志科技大學<br>化學工程系碩士班<br>102<br>The work reports the preparation of the Li3V2(PO4)3/C (named as LVP/C) composite material by the hydrothermal method and the post-sintering treatment. By using polystyrene (PS) polymer and polystyrene sphere (PS sphere) the carbon additives as the carbon sources and extra carbon sphere (CS) and graphene used as additives; the hydrothermal process and post-thermal treatment were used in sequence to prepare LVP/C composite material. It was found that the poor electron conductivity problem of the LVP/C materials can be solved by adding those composite carbon sou

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Chen, Hsiao Ling, and 陳筱玲. "Study on carbon nanotubes/PEDOT:PSS composite as cathode material for seawater batteries." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/84c7ha.

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Chang, Bo-fu, and 張博富. "Doping lathnaum-ion to modify LiFePO4/C composite Li-ion cathode material." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/19521269159675879629.

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碩士<br>國立中央大學<br>化學工程與材料工程研究所<br>96<br>In order to enhance the capability of LiFePO4 materials, we attempted to coat carbon and dope lanthanum-ion by a high temperature solid-state method. The starting materials of the LiFe1-xLaxPO4/C composite were synthesized using lithium carbonate, iron (II) oxalate dihydrate, ammonium dihydrogen phosphate and lanthanum nitrite. The purity of LiFe0.99La0.01PO4/C was confirmed by XRD analysis. Galvanostatic cycling and conductivity measurements were used to evaluate the material’s electrochemical performance. A galvanostatic charge-discharge study was carrie

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Ming-HungLai and 賴明宏. "The investigation of electrochemical impedance characteristics on composite cathode of IT-SOFC." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/31217364040007620578.

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碩士<br>國立成功大學<br>材料科學及工程學系<br>102<br>The intermediate temperature solid oxide fuel cells (ITSOFC) were developed to reduce the operating temperature of SOFC to 600oC-800oC. However, the performance of IT-SOFC is highly dependent on the interface resistance (or polarization) of SOFC cathode. To reduce interface resistance of SOFC cathode, the concept of composite cathode consisting of ionic conducting and electronic components has been recongnized to be effective to decrease the cathodic polarizaton and improve the performance of SOFC. Therefore, the objective of this study is to minimize the ca

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HSU, YA-TING, and 許雅婷. "Preparation of LiFe0.5Mn0.3Co0.2PO4/C Composite Cathode Material and Its Electrochemical Performance Analysis." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/57985248459174087659.

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碩士<br>明志科技大學<br>化學工程系碩士班<br>104<br>The LiFe0.5Mn0.3Co0.2PO4/C (denoted as LFMCP/C) composite cathode material with olivine structure was prepared by a solid-state ball-milled method. The reactants are tartaric acid (as a reducing agent), BP2000 carbon black and sucrose as the carbon sources. The properties of the as-synthesized LFMCP/C composite cathode materials were examined by XRD, micro-Raman, SEM/EDX, HR-TEM, EA, and TXRF. The 2032 coin cell was assembled to study the electrochemical performance of the LFMCP/C composite materials. The galvanostatic charge-discharge test was conducted in t

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Lin, Ting-Yu, and 林廷諭. "Characterization and electrochemical performance of La0.6Sr0.4Co0.2Fe0.8O3-based composite cathode for IT-SOFCs." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/55921615772251359925.

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碩士<br>國立臺灣大學<br>材料科學與工程學研究所<br>100<br>This study, select the several composite cathode materials for multiple layered half-cell (cathode / electrolyte) fabrication and precede analysis of the interface resistance and polarization resistance, and then further fabricated a full single cell, measuring power output. Electrode material Gd2O3 doped cerium spherical powder with different particle sizes were synthesized by co-precipitation method, preparation of, add of cerium oxide (GDC). In addition, by using the Pechini method to synthesize GDC and LSCF powder as the barrier layer. With the additi

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Chiou, Tze-Jiun, and 邱則鈞. "Storage Ageing Effects of Commercial LIB with Composite LMO-LNMC Cathode Material." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/06763694358853878251.

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碩士<br>大同大學<br>化學工程學系(所)<br>101<br>Storage ageing effects of commercial lithium-ion battery with composite LMO-LNMC cathode material has been investigated in this study. Sixteen sets of batteries were stored in four temperatures each with four depths of charge for six months. The batteries were charged and discharged at a constant current every month, and the impedances were determined in order to investigate the change inside the battery during charge and discharge, and to investigate the phenomenon of battery ageing. Results show that capacity decrease of the commercial batteries stored betwe

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Huang, Hsien-Sheng, and 黃憲聖. "Improvement of LiFePO4 carbon source performance in lithium battery cathode composite material." Thesis, 2013. http://ndltd.ncl.edu.tw/handle/92116854620841227122.

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碩士<br>國立雲林科技大學<br>環境與安全衛生工程系碩士班<br>101<br>In this study, by co-precipitation prepared Lithium iron phosphate ( LiFePO4 ) cathode material, use Ammonium Dihydrogenphosphate ( NH4H2PO4 ) and Ferrous Ammonium Sulfate ( Fe(NH4)2 (SO4)2 ) as the precursor of the substrate FePO4, then manufacture LiFePO4 Cathode material by adding Lithium iodide ( ILi ). In order to decrease material impurity generation and increase the electrical capacity, we added types of different carbon sources such as glucose Glucose ( C6H12O6 ) and sucrose ( C12H22O11 ) and the carbon source, the proportion of weight percent

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SU, QING-HUI, and 蘇清暉. "Synthesis and Electrochemical Characterizations of W, Mg doped Li1.2Ni0.2Mn0.6O2 Composite Cathode Material." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/yub3ms.

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碩士<br>輔仁大學<br>化學系<br>106<br>Spherical Li1.2Ni0.2Mn0.6O2 (LNMO) composite cathode materials with the particle size of 5-10 µm had been synthesized via a carbonate co-precipitation method and were doped with the 1.0 mol% Mg(Mg-LNMO) and 0.5 mol% W(W-LNMO), respectively, to promote the electrochemical performance. The morphologies, crystal structures and element analysis of the powders were characterized using a scanning electron microscope (SEM) with energy dispersive spectroscope (EDS), inductively coupled plasma emission spectroscopy (ICP) and X-ray diffraction detector (XRD). From the XRD pat

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LI, YA-RU, and 李亞儒. "Effect of Different Morphology Graphene Oxide on LiFePO4/C Composite Cathode Materials." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/ne435c.

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碩士<br>明志科技大學<br>化學工程系碩士班<br>106<br>This work reported preparation of LiFePO4/C (LFP/C) with different types of graphene oxides (denoted as GOs) by a spray-dry assisted sol-gel method. In order to enhance the electrochemical performance of LFP/C/GO, we prepared the GO, 3DGO and HTGO carbon additives for LFP/C/GO. The 3DGO carbon additive was prepared by using PMMA polymer sphere as the template to form the 3D morphology. The HTGO carbon additive was modified by a hydrothermal process and KOH activation to form the porous morphology and also has 3D structure. The characteristic properties were e

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Zhong, Wei Xuan, та 鍾維軒. "Co-precipitation Synthesis of La0.6Sr0.4Co0.2Fe0.8O3-δ - Sm0.2Ce0.8 O3-δfor IT-SOFC Composite Cathode". Thesis, 2009. http://ndltd.ncl.edu.tw/handle/m8t2c9.

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碩士<br>國立臺北科技大學<br>資源工程研究所<br>98<br>In the study, we use KOH and carbamide as deposit agent. By co-precipitation method, we replace YSZ for SDC material as cathode material La0.6Sr0.4Co0.2Fe0.8O3-δ - Ce0.8Sm0.2O3-δ for mixed-conducting, and further discuss the property differences by the effect of coating between LSCF and SDC. As the research turns out that the particle size is 300~400 nm after LSCF powder had synthesized by KOH by sintering at 900oC / 2 h, and BET is ~ 4.51 m2/g; whereas the rhombus and long plank shape of SDC powder are attributed to the synthesis of urea, and particle size i

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LUO, JIAN-MIN, and 羅健珉. "Paparation of La-doped LiFePO4/C Composite Cathode Materials by Solid State Method." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/39926436885343817567.

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碩士<br>明志科技大學<br>化學工程系碩士班<br>104<br>Olivine-type lithium iron phosphate (LiFePO4, LFP) is currently regarded as having considerable potential for the development of lithium-iron battery as the cathode materials, but its poor conductivity and low diffusion rate of lithium ions limit its practical value. In general, the use of carbon coating, metal doping, and other ways to enhance the electronic conductivity of lithium iron phosphate material have been reported in the literature. In this study, we synthesized the lanthanum-doping lithium iron phosphate (LiFe1-xLaxPO4, x=0.01, 0.05, 0.10, 0.20, L

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