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Dissertations / Theses on the topic 'High Temperature Proton Exchange Membrane Fuel Cell'

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Published: 4 June 2021

Last updated: 1 February 2022

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1

Ergun, Dilek. "High Temperature Proton Exchange Membrane Fuel Cells." Master's thesis, METU, 2009. http://etd.lib.metu.edu.tr/upload/12610803/index.pdf.

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It is desirable to increase the operation temperature of proton exchange membrane fuel cells above 100oC due to fast electrode kinetics, high tolerance to fuel impurities and simple thermal and water management. In this study<br>the objective is to develop a high temperature proton exchange membrane fuel cell. Phosphoric acid doped polybenzimidazole membrane was chosen as the electrolyte material. Polybenzimidazole was synthesized with different molecular weights (18700-118500) by changing the synthesis conditions such as reaction time (18-24h) and temperature (185-200oC). The formation of po

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2

Einsla, Brian Russel. "High Temperature Polymers for Proton Exchange Membrane Fuel Cells." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/27320.

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Novel proton exchange membranes (PEMs) were investigated that show potential for operating at higher temperatures in both direct methanol (DMFC) and H2/air PEM fuel cells. The need for thermally stable polymers immediately suggests the possibility of heterocyclic polymers bearing appropriate ion conducting sites. Accordingly, monomers and random disulfonated poly(arylene ether) copolymers containing either naphthalimide, benzoxazole or benzimidazole moieties were synthesized via direct copolymerization. The ion exchange capacity (IEC) was varied by simply changing the ratio of disulfonated

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3

Hartz, Alexandra. "High Temperature Proton Exchange Membrane Fuel Cell Optimization of Flow Channel Geometry." Thesis, The University of Arizona, 2013. http://hdl.handle.net/10150/301666.

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Several groups are studying and researching major factors which influence high temperature proton exchange membrane fuel cells. These factors include material type, temperature, and fuel cell lifespan. Only a few groups research the optimization of the size of the fuel channels within the fuel cell. For channel optimization, a model was created to find the optimum flow channel and rib widths. The approach used was to code the losses due to activation, concentration, and ohmic polarizations to yield the fuel cell voltage and power expected from the fuel cell itself. The model utilizes the speci

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4

Yurdakul, Ahmet Ozgur. "Acid Doped Polybenzimidazole Membranes For High Temperature Proton Exchange Membrane Fuel Cells." Master's thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/2/12608506/index.pdf.

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Acid Doped Polybenzimidazole Membranes for High Temperature Proton Exchange Membrane Fuel Cells Author: Ahmet &Ouml<br>zg&uuml<br>r Yurdakul One of the most popular candidates for high temperature PEMFC&rsquo<br>s is phosphoric acid doped polybenzimidazole (PBI) membrane due to its thermal and mechanical stability. In this study, high molecular weight PBI was synthesized by using PPA polymerization. The stirring rate of reaction solution was optimized to obtain high molecular weight. The inherent viscosity of polymer was measured at four points in 96 percent sulphuric acid solution at 30 degre

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5

Maasdorp, Lynndle Caroline. "Temperature proton exchange membrane fuel cells in a serpentine design." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_1316_1307961639.

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<p>The aim of my work is to model a segment of a unit cell of a fuel cell stack using numerical methods which is classified as computational fluid dynamics and implementing the work in a commercial computational fluid dynamics package, FLUENT. The focus of my work is to study the thermal distribution within this segment. The results of the work aid in a better understanding of the fuel cell operation in this temperature range. At the time of my investigation experimental results were unavailable for validation and therefore my results are compared to previously published results published. The

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6

Bai, He. "High temperature proton-exchange and fuel processing membranes for fuel cells and other applications." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1204732417.

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7

Zhou, Zhen. "Development of polymer electrolyte membranes for fuel cells to be operated at high temperature and low humidity." Diss., Atlanta, Ga. : Georgia Institute of Technology, 2007. http://hdl.handle.net/1853/22559.

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Thesis (Ph. D.)--Chemistry and Biochemistry, Georgia Institute of Technology, 2007.<br>Committee Chair: Wong, C.P.; Committee Co-Chair: Liu, Meilin; Committee Member: Barefield, Kent; Committee Member: Collard, David; Committee Member: Fahrni, Christoph.

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8

Nomnqa, Myalelo Vuyisa. "Simulation and optimisation of a high temperature polymer electrolyte membrane fuel cell stack for combined heat and power." Thesis, Cape Peninsula University of Technology, 2011. http://hdl.handle.net/20.500.11838/880.

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Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, 2011<br>High temperature polymer electrolyte membrane fuel cells (PEMFC) operating between 120-180 oC are currently of much research attention. The acid doped polybenzimidazole (PBI) membranes electrolyte are known for their tolerance to relatively high levels of carbon monoxide impurity in the feed. Most fuel cell modelling are theoretical in nature and are solved in commercial CFD platforms such as Fluent. The models require a lot of time to solve and are not simple enough to be used in complex systems such

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9

De, Beer Chris. "Dynamic modelling and emulation of a high temperature proton exchange membrane fuel cell (HT PEMFC)." Master's thesis, University of Cape Town, 2011. http://hdl.handle.net/11427/10330.

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Includes bibliographical references (p. 152-157).<br>Fuel cells (FC) are power sources that convert chemical energy into electrical and thermal energy in a clean and efficient manner. In the 21st century, fuel cells appear poised to meet the power demands of a variety of applications, ranging from portable electronics to utility power plants. Compared to systems utilizing fossil fuels, fuel cells offer greater efficiency and superior reliability. In particular, proton exchange membrane FCs (PEMFCs) presents a good alternative energy source for distributed generation (DG) systems. FCs however,

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10

Nomnqa, Myalelo Vuyisa. "Design of a domestic high temperature proton exchange membrane fuel cell cogeneration system : modelling and optimisation." Thesis, Cape Peninsula University of Technology, 2017. http://hdl.handle.net/20.500.11838/2574.

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Thesis (DTech (Chemical Engineering))--Cape Peninsula University of Technology, 2017.<br>Fuel cells are among power generation technologies that have been proven to reduce greenhouse gas emissions. They have the potential of being one of the most widely used technologies of the 21st century, replacing conventional technologies such as gas turbines in stationary power supplies, internal combustion engines in transport applications and the lithium-ion battery in portable power applications. This research project concentrates on the performance analysis of a micro-cogeneration system based o

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11

Lee, Hae-Seung. "Synthesis and Characterization of Multiblock Copolymer Proton Exchange Membranes for High Temperature Fuel Cell Applications." Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/27574.

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The potential success of a proton exchange membrane (PEM) fuel cell as an alternative energy source depends highly upon the development of high performance PEMs. Typically, state-of-the-art PEMs have been perfluorinated sulfonated ionomer membranes such as NafionÂ® by DuPont. Although these membranes demonstrate good mechanical and electrochemical properties under moderate operating conditions (e.g., < 80 ÂºC), their performance at high temperature (e.g., > 80 ÂºC) and low relative humidity (RH) drastically deteriorates. To overcome these problems, PEM materials with enhanced properties are e

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12

Badami, Anand Shreyans. "Morphological and Structure-Property Analyses of Poly(arylene ether sulfone)-Based Random and Multiblock Copolymers for Fuel Cells." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/29469.

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The commercialization of proton exchange membrane (PEM) fuel cells depends largely upon the development of PEMs whose properties are enhanced over current perfluorinated sulfonic acid PEMs. Understanding how a PEMâ s molecular weight and morphology affect its relevant performance properties is essential to this effort. Changes in molecular weight were found to have little effect on the phase separated morphologies, water uptake, and proton conductivities of random copolymers. Changes in block length, however, have a pronounced effect on multiblock copolymers, affecting surface and bulk mor

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13

Schonvogel, Dana [Verfasser], Michael [Akademischer Betreuer] Wark, and K. Andreas [Akademischer Betreuer] Friedrich. "Graphene-Based electrocatalysts for oxygen reduction reaction in high temperature proton exchange membrane fuel cells / Dana Schonvogel ; Michael Wark, K. Andreas Friedrich." Oldenburg : BIS der Universität Oldenburg, 2018. http://d-nb.info/1176106570/34.

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14

Hibino, Takashi, Mitsuru Sano, Masahiro Nagao, and Pilwon Heo. "A High-Performance Mo2C-ZrO2 Anode Catalyst for Intermediate-Temperature Fuel Cells." The Electrochemical Society, 2007. http://hdl.handle.net/2237/18429.

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15

von, Kraemer Sophie. "Membrane Electrode Assemblies Based on Hydrocarbon Ionomers and New Catalyst Supports for PEM Fuel Cells." Doctoral thesis, KTH, Tillämpad elektrokemi, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-9208.

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The proton exchange membrane fuel cell (PEMFC) is a potential electrochemicalpower device for vehicles, auxiliary power units and small-scale power plants. In themembrane electrode assembly (MEA), which is the core of the PEMFC single cell,oxygen in air and hydrogen electrochemically react on separate sides of a membraneand electrical energy is generated. The main challenges of the technology are associatedwith cost and lifetime. To meet these demands, firstly, the component expensesought to be reduced. Secondly, enabling system operation at elevated temperatures,i.e. up to 120 °C, would decre

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DOUBEK, GUSTAVO. "Desenvolvimento de sistemas catalíticos não suportados para células a combustível de membrana polimérica de temperatura elevada de operação." reponame:Repositório Institucional do IPEN, 2013. http://repositorio.ipen.br:8080/xmlui/handle/123456789/10570.

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Made available in DSpace on 2014-10-09T12:42:05Z (GMT). No. of bitstreams: 0<br>Made available in DSpace on 2014-10-09T14:05:52Z (GMT). No. of bitstreams: 0<br>Tese (Doutoramento)<br>IPEN/T<br>Instituto de Pesquisas Energeticas e Nucleares - IPEN-CNEN/SP

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17

Rouhet, Marlene. "Etude de l'influence des protons sur la réduction de l'oxygène dans des couches catalytiques ordonnées en vue d'une application en pile à combustible." Thesis, Strasbourg, 2014. http://www.theses.fr/2014STRAF031/document.

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Les couches catalytiques avec une structure ordonnée à base de nanoparticules de Pt supportées sur des nanofilaments de carbone verticalement alignés ont montré des performances intéressantes grâce à l’amélioration des propriétés du transport de matière et à une meilleure utilisation du Pt. Des études électrochimiques combinées à une modélisation mathématique ont mis en évidence l’influence du transport de protons sur les processus d’oxydo-réduction, la cinétique et le mécanisme de réduction de l’O2 (ORR), et sur H2O2 qui s’échappe des couches pendant l’ORR. Nous avons montré que (i) les proto

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18

Ntsendwana, Bulelwa. "Advanced low temperature metal hydride materials for low temperature proton exchange membrane fuel cell application." Thesis, University of the Western Cape, 2010. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_8494_1307431585.

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<p>Energy is one of the basic needs of human beings and is extremely crucial for continued development of human life. Our work, leisure and our economic, social and physical welfare all depend on the sufficient, uninterrupted supply of energy. Therefore, it is essential to provide adequate and affordable energy for improving human welfare and raising living standards. Global concern over environmental climate change linked to fossil fuel consumption has increased pressure to generate power from renewable sources [1]. Although substantial advances in renewable energy technologies have been made

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19

Castanheira, Luis Filipe Rodrigues. "Corrosion of high surface area carbon supports used in proton-exchange membrane fuel cell electrodes." Thesis, Grenoble, 2014. http://www.theses.fr/2014GRENI084/document.

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Cette thèse est consacrée à l’étude des mécanismes de dégradation de noirs de carbone de forte surface spécifique (HSAC) utilisés comme supports d’électrocatalyseurs dans une pile à combustible à membrane échangeuse de protons (PEMFC). Nous avons montré que le mécanisme et les cinétiques de la corrosion électrochimique du carbone (COR) sont influencés par la présence d’ionomère Nafion®, la limite supérieure de potentiel électrochimique, la nature et le nombre de caractérisations intermédiaires présentes dans des tests de dégradation accélérés. En utilisant la spectroscopie Raman,il apparaît qu

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20

Sano, Mitsuru, Takashi Hibino, Masahiro Nagao, Hidetaka Shibata, and Pilwon Heo. "Performance of an Intermediate-Temperature Fuel Cell Using a Proton-Conducting Sn0.9In0.1P2O7 Electrolyte." The Electrochemical Society, 2006. http://hdl.handle.net/2237/18427.

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21

Zapata, Pedro José. "High throughput study of fuel cell proton exchange membranes: poly(vinylidene fluoride)/acrylic polyelectrolyte blends and nanocomposites with zirconium." Diss., Georgia Institute of Technology, 2009. http://hdl.handle.net/1853/33991.

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In view of the unfavorable panorama of actual energy supply practices, alternative sustainable energy sources and conversion approaches have acquired noteworthy significance in recent years. Among these, proton exchange membrane fuel cells (PEMFCs) are being considered as a pivotal building block in the transition towards a sustainable energy economy. The proton exchange membrane (PEM) is a vital component, as well as a performance-limiting factor, of the PEMFC. Consequently, the development of high performance PEM materials is of upmost importance for the advance of the PEMFC field. In this w

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22

Liu, Qingting. "Poly (2,5-benzimidazole) based polymer electrolyte membranes for high temperature fuel cell applications." Thesis, Loughborough University, 2010. https://dspace.lboro.ac.uk/2134/6933.

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Polymer electrolyte membrane fuel cells (PEMFCs) are one of the most promising clean technologies under development. However, the main obstacles for commercialising PEMFCs are largely attributed to the technical limitations and cost of current PEM materials such as Nafion. Novel poly(2,5-benzimidazole) (ABPBI)/POSS based polymer composite electrolyte membranes with excellent mechanical and conductivity properties were developed in this project including (I) ABPBI, polybenzimidazole (PBI) and their copolymers were synthesised by solution polymerisation and their chemical structures were confirm

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23

Baker, Ryan Christopher Colin. "Substituted iron phthalocyanines : electrocatalytic activity towards O₂ reduction in a proton exchange membrane fuel cell cathode environment as a function of temperature." Thesis, University of British Columbia, 2008. http://hdl.handle.net/2429/5030.

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In this thesis five iron phthalocyanines (FePc’s), four of which having different electron withdrawing or electron donating substituents, were evaluated as 0₂ reduction reaction (ORR) catalysts. The experimental approach simulated a PEM fuel cell environment using both ex-situ electrochemical techniques and in situ fuel cell testing. The kinetic ORR parameters for the FePc species each adsorbed on a pyrolytic graphite WE were evaluated at four temperatures (20, 40, 60, 80°C) in a novel half cell using cyclic voltammetry (CV) and rotating disk electrode (RDE) voltammetry. Kinetic ORR parameters

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24

Wiles, Kenton Broyhill. "High Performance Disulfonated Poly(arylene Sulfone) Co- and Terpolymers For Proton Exchange Membranes For Fuel Cell And Transducer Applications: Synthesis, Characterization And Fabrication Of Ion Conducting Membranes." Diss., Virginia Tech, 2005. http://hdl.handle.net/10919/27096.

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The results described in this dissertation have demonstrated several alternative proton exchange membranes (PEM) for hydrogen-air and direct methanol fuel cells (DMFC) that perform as well or better than the state of the art Nafion perfluorosulfonic acid membrane. Direct aromatic nucleophilic substitution polycondensations of disodium 3,3â S-disulfonate-4,4â S-difluorodiphenylsulfone (SDFDPS), 4,4â S-difluorodiphenylsulfone (DFDPS) (or their chlorinated analogs, SDCDPS, DCDPS) and 4,4â S-thiobisbenzenethiol (TBBT) in the presence of potassium carbonate were investigated. Electrophilic ar

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25

Ma, Yulin. "The Fundamental Studies of Polybenzimidazole/Phosphoric Acid Polymer Electrolyte for Fuel Cells." Case Western Reserve University School of Graduate Studies / OhioLINK, 2004. http://rave.ohiolink.edu/etdc/view?acc_num=case1089835902.

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26

Guenot, Benoit. "Etude de matériaux catalytiques pour la conversion électrochimique de l'énergie Clean hydrogen generation from the electrocatalytic oxidation of methanol inside a proton exchange membrane electrolysis cell (PEMEC): effect of methanol concentration and working temperature Electrochemical reforming of Dimethoxymethane in a Proton Exchange Membrane Electrolysis Cell: a way to generate clean hydrogen for low temperature fuel cells." Thesis, Montpellier, Ecole nationale supérieure de chimie, 2017. http://www.theses.fr/2017ENCM0004.

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L’hydrogène est un vecteur énergétique prometteur réalisant une très bonne synergie avec l’exploitation des sources d’énergie intermittentes telles que le solaire ou l’éolien. Le développement de ses moyens de production et de conversion électrochimique représente un enjeu majeur dans le contexte de transition énergétique dans lequel nous vivons aujourd’hui. Les piles à combustible et les électrolyseurs utilisant la technologie PEM (Membrane Echangeuse de Protons) sont des systèmes électrochimiques de conversion de l’énergie matures tandis que les systèmes réversibles capables de remplir ces d

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27

Woo, Sahng Hyuck. "Membranes composites acide perfluorosulfonique (PFSA)/argile pour un fonctionnement à faible humidité relative et haute température des piles à combustible à membrane échangeuse de protons (PEMFC)." Thesis, Paris Sciences et Lettres (ComUE), 2019. http://www.theses.fr/2019PSLEM033.

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Cette thèse introduit de nouvelles membranes électrolytiques pouvant fonctionner à faible humidité relative (inférieure à 50%) et à une température intermédiaire, c'est-à-dire 90°C voire au-delà. Plus spécifiquement, la thèse tire profit de l'hygroscopicité de la morphologie d’argiles naturelles, lasépiolite microfibreuse et l’halloysite tubulaire . Ces nanoargiles ont été intégrées à des suspensions de Nafion® ou Aquivion pour préparer des membranes composites. Elles ont été fonctionnalisées et prétraitées pour les rendre conductrices protoniques et améliorer leur compatibilité avec les matri

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28

Lin, Yu-Heng, and 林雨衡. "Numerical Modeling on the High-temperature Proton Exchange Membrane Fuel Cell." Thesis, 2012. http://ndltd.ncl.edu.tw/handle/00152478872888503448.

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碩士<br>國立中興大學<br>機械工程學系所<br>100<br>Fuel cells operated at high temperature provide two main advantages as compared with their low-temperature counterparts: no water management problem and high carbon monoxide poison resistance at the anode. In this study, a two-dimensional model was developed to study the performance of fuel cell operated at temperature in the ranges of 120 to 190℃ using phosphoric acid doped polyberzimidazole (PBI) membrane. Coupled mass conservation, fluid flow, species transport, and charge conservation were solved numerically. An agglomerate model was used to describe the d

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Chen, Chin He, and 陳慶和. "Activation and Degradation Investigation of High Temperature Proton Exchange Membrane Fuel Cell." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/07667758912135982081.

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碩士<br>元智大學<br>機械工程學系<br>96<br>It’s the invention of polybenzimidazole (PBI) that makes proton exchange membrane fuel cell (PEMFC) operating at high temperature (120~200℃) possible. For cell temperature higher than 100℃, liquid water flooding that happens for current low temperature PEMFC would be ignored. In addition, tolerance of catalyst for CO would be increased. Therefore, requirement for CO concentration from reformer would be lower comparing to that for low temperature PEMFC. Currently, Nafion-based low temperature PEMFC experiences several hours as pre-treatment for attaining high and

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HUANG, SHIH-MING, and 黃士明. "CO tolerance of a high-temperature proton exchange membrane fuel cell stack." Thesis, 2016. http://ndltd.ncl.edu.tw/handle/82940184961551236104.

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碩士<br>中國文化大學<br>機械工程學系數位機電碩士班<br>104<br>Due to the future shortage of fossil fuel, discovery of new energy sources becomes one of the important global issues. The fuel cell is a green energy technology of great potential because the main product of fuel cells is water. Therefore, using fuel cells will not impact on the environment seriously. Fuel cells can be classified according to the type of electrolyte. Among all kinds of fuel cell, the proton exchange membrane fuel cell is one of the most well-developed types. Thus, the proton exchange membrane fuel cell is selected as the target in this

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Chien, Wei-Hsiang, and 簡偉翔. "Performance and Activation Investigation of High Temperature Proton Exchange Membrane Fuel Cell." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/14327428585004685338.

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碩士<br>元智大學<br>機械工程學系<br>95<br>General speaking, liquid water acts the important role about fuel cell performance and stability. Due to the most of liquid water will be vapor in the process of operating High Temperature Proton Exchange Membrane Fuel Cell (HT-PEMFC), therefore the performance is different of LT-PEMFC. Effect of flooding and membrane drying will greatly reduce. Performance using dried fuel will be better than low temperature. After some specific procedure of activation operation, performance of low temperature proton exchange membrane fuel cell (LT-PEMFC) will be promoted and sta

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Guan-ting, Hou, and 侯官廷. "Sulfonated TiO2 Nanotube / Nafion composite membrane for High Temperature Proton Exchange Membrane Fuel Cell (PEMFC)." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/71625544145593777777.

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碩士<br>國立中央大學<br>化學研究所<br>99<br>Nafion has more excellent stability and conductivity in comparison to other materials. However, Nafion shows severe loss of water and reduced proton conductivity under high temperature operating conditions. Proton exchange membrane prepared by inorganic nanomaterials composite can increase water retention at high temperatures. These composite membranes can maintain high conductivity at high temperatures and even enhances cell performance at low humidity condition. In this study, a novel organic/inorganic composite proton conducting membrane were prepared by blend

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Jhang, Zong-bo, and 張宗柏. "Research on integrated High-temperature proton exchange membrane fuel cell with hydrogen production system." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/80409821685918880613.

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碩士<br>元智大學<br>機械工程學系<br>98<br>High temperature proton exchange membrane fuel cell operated at high temperature (160 ~ 200℃) can reduce water and heat management, because of the liquid has vaporized and reduce the flooding. The performance won’t decay in dry gas. It also can operate with reformer directly. Hydrogen produced by reformer contains carbon monoxide (CO) which can poison the anode catalyst. Therefore raising operating temperature can reduce CO poison from anode. In this study the cell temperature operated at 160℃ to 200℃. The anode gas uses pure hydrogen, and two kinds of synthesis

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Li, Liang-Yi, and 李亮儀. "Sulfonated Titanium Oxide Nanotube Composite for High Temperature Proton Exchange Membrane Fuel Cell (PEMFC)." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/56699301886323127550.

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碩士<br>國立中央大學<br>化學研究所<br>96<br>Numerous advantages are identified in operating fuel cell at elevated temperature, which include better tolerance towards CO poisoning, higher electro-chemical kinetics, and promising of higher output power. However, the output power of PEMFC using state of art proton exchange membrane is dramatically reduced due to increase of internal resistance from the loss of water from these membranes as the temperature increases to above 80C. Currently the proton conduction of the perfluorosulfonic acid ( PFSA , such as Nafion ) membranes rely on water for proton transpor

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Kuo, Ying–Chieh, and 郭英傑. "Influence of mesoporous fillers on performance of high–temperature proton exchange membrane fuel cell." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/4s4kq3.

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博士<br>元智大學<br>化學工程與材料科學學系<br>107<br>The incorporation of nanoscale additives in polybenzimidazoles (PBI) membranes is an effective way of simultaneous increasing the proton conductivity and improving the mechanical stability of the membranes during acid doping, as well as increasing their reliability with respect to membrane electrode assembly (MEA) fabrication. In this study, we tried to study the principle of mesoporous fillers on the performance of high–temperature proton exchange membrane fuel cell, and tried to observe the effects of different mesoporous filler materials on the performanc

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AinurRosidah, Afira, and 羅海誼. "Functionalized Carbon Nanofiber/PBI Nanocomposite Membranes for High Temperature Proton Exchange Membrane Fuel Cells." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/6x47ry.

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Chen, Kuan-chia, and 陳冠嘉. "Research on integrated system of high-temperature proton exchange membrane fuel cell with internal reformer." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/71964915089112246507.

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碩士<br>元智大學<br>先進能源研究所<br>99<br>In this study, focus on three parts in integration with high temperature proton exchange membrane fuel cell (HT-PEMFC) and internal reformer. First, use the commercial catalyst in reformer and experiment with different methanol inlet flow rate and operate temperature to find the best hydrogen production efficiency. The heat was provided by home-made combustor. Second, experiment the effect on different operate temperature and fuel flow rate in cell performance. Final, integrated home-made combustor, reformer and HT-PEMFC together, compare the performance with fue

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Lin, Jin-Yung, and 林靖詠. "Preparation of PBI catalyst layers for high-temperature proton exchange membrane fuel cells." Thesis, 2010. http://ndltd.ncl.edu.tw/handle/84658349858719588701.

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碩士<br>元智大學<br>機械工程學系<br>98<br>Nafion in the low temperature proton exchange membrane (PEM) fuel cell can conducted proton with moderate moisture content, therefore when in the low humidity and high operation temperature up to 90℃ the membrane conductivity will decrease due to the water evaporation. In this study, we use the high polymer material polybenzimidazole (PBI) as a proton exchange membrane for high temperature PEMFC. PBI has good thermal stability, high anti-chemical corrosion ability and high glass transition temperature. PBI was used as the binder in the catalyst layers the membrane

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Chia-WeiLiu and 劉家瑋. "Synthesis and properties of polyphenylquinoxalines for high-temperature proton exchange membrane fuel cells." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/45344946811809942937.

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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>In this study, the one-pot synthesis of self-polymerizable quinoxaline monomer was developed. 3-(4-hydroxyphenyl)-2-phenyl-6-fluoroquinoxaline and 2-(4-hydroxyphenyl)-3-phenyl-6-fluoroquinoxalinemixture was synthesized from benzyl 4-hydroxyphenyl ketone and 1,2-diamino-4-fluorobenzene, catalyzed by 1,4-diazabicyclo[2.2.2]octane. Then, an ether-containing polyphenylquinoxaline(PPQ) was synthesized successfully from the monomer. The ether-containing PPQ is organosoluble, and has good proton conductivity at high temperature after doping with phosphoric acid. It

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jie, Huang Yan, and 黃彥傑. "Effects of Channel Block on the Performance of a High Temperature Proton Exchange Membrane Fuel Cell." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/r28r7e.

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碩士<br>中國文化大學<br>機械工程學系數位機電碩士班<br>106<br>This research successfully developed a single channel three dimensional model of high temperature proton exchange membrane fuel cells. The effects of channel blocks and air velocity on the cell performance were studied via the multi-physics coupling software, COMSOL Multiphysics®. The simulation results were verified with experimental data and thus had good credibility. In addition to polarization curves, the fundamental characteristics, including the oxygen concentration distribution, water vapor concentration distribution, air velocity vector and the c

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Hung, Hsiao-Wei, and 洪曉薇. "Synthesis and Properties of Fluorine-containing Polybenzimidazole for High Temperature Proton Exchange Membrane Fuel Cell Applications." Thesis, 2018. http://ndltd.ncl.edu.tw/handle/j23wjp.

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碩士<br>國立臺灣科技大學<br>材料科學與工程系<br>106<br>A novel tetraamine was synthesized via several steps. Novel polybenzimidazoles P1 was prepared from OBA and monomer (7). The structures of all compounds and P1 were characterized by 1H-NMR. The inherent viscosity of P1, measured in methanesulfonic acid at 35 ℃ and 0.2 g/dL, was 2.1 dL/g, respectively. P1 could be prepared as transparent, flexible, and tough membrane by solution casting. P1 show outstanding thermal stability. When P1 membrane was immersed in different concentrations of phosphoric acid (75, 65 and 55 %) at room temperature, we could obtain P

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Tsai, Yi-Yo, and 蔡宜祐. "Ethyl phosphoric acid grafted polysilicate (PSi-EP) membranes for high temperature proton exchange membrane fuel cells." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/35s667.

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碩士<br>元智大學<br>化學工程與材料科學學系<br>105<br>In this study, a membrane electrode assembly (MEA) was prepared by grafting PSi-EP with H3PO4 proton exchange membrane. Fuel cell test at 210 oC, Fuel (H2/air) at 0.6 V, Potential i = 350 mA / cm2 in the absence of back pressure and humidity 0% RH. Maximum power density is 390 mW / cm2 ( At i = 1080 mA/ cm2). After 40 hours of continuous operation, the fuel cell is stable. As the operating temperature of 210 oC close to the hydrogen recombiner operating temperature, fuel cell and hydrogen recombination device combination of fuel cell operation can be directl

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Teng-ShienHuang and 黃騰賢. "Performance Study of Novel Cross-linked Polybenzimidazole Membranes for High Temperature Proton Exchange Membrane Fuel Cells." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/wr7b43.

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Chia-LunHu and 胡家倫. "Performance Study of Polybenzimidazole/Ionic Liquids Composite Membranes for High Temperature Proton Exchange Membrane Fuel Cells." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/4x3ftw.

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Wu, Jin-An, and 吳晉安. "Synthesis and Characterization of Novel Polyelectrolytes and Their Applications on High Temperature Proton Exchange Membrane Fuel Cell." Thesis, 2015. http://ndltd.ncl.edu.tw/handle/v5vuja.

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博士<br>國立臺灣科技大學<br>材料科學與工程系<br>104<br>This dissertation includes three parts. The first part is “Highly Phenylated Polyimides Containing 4,4'-Diphenylether Moiety”. The second part is “Synthesis and Characterization of Novel Imidazolium-Functionalized Polyimides for High Temperature Proton Exchange Membrane Fuel Cells”. The third part is “Synthesis and Characterization of Novel Electrolyte Membranes Based on Imidazolium- Containing Polyelectrolytes and Ionic Liquid for High Temperature Proton Exchange Membrane Fuel Cells”. In the first part, a new aromatic diamine, 2,2',6,6'-tet

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LIN, CHIEN, and 林謙. "The Study on the Flow Channel Modification of High Temperature Proton Exchange Membrane Fuel Cells." Thesis, 2019. http://ndltd.ncl.edu.tw/handle/62vx85.

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碩士<br>中國文化大學<br>機械工程學系數位機電碩士班<br>107<br>In this research, a single-channel three-dimensional model of a high-temperature proton exchanging membrane fuel cell was successfully developed vis Comsol Multiphysics software. This research investigated the effects of air velocity and block length on the pumping power loss, mass transfer characteristics and performance of the fuel cell. The results show that increasing the block length improves the mass transfer efficiency and cell performance. The block installed in the flow channel increases the local gas velocity and promotes the transportation of

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Tsai, Wan-Hsiu, and 蔡椀琇. "NUMERICAL STUDY OF THE CATHODE CATALYST LAYER OF HIGH TEMPERATURE PROTON EXCHANGE MEMBRANE FUEL CELLS." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/02639597818894270306.

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碩士<br>元智大學<br>機械工程學系<br>99<br>In this study, a steady-state, isothermal and two-dimensional mathematical model of high temperature proton exchange membrane fuel cells has been developed and we using the COMSOL Multiphysics software. In this model including PBI membrane, catalyst layers, gas diffusion layer. The model treats the catalyst layer as agglomerates of polymer electrolyte coated catalyst particles. In order to find out the optimal distributions of PBI wt% across the entire thickness of cathode catalyst layers to polymer electrode membrane, it has to investigate the sensitivity paramet

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Chuang, Shih-Wei, and 莊士緯. "Synthesis and properties of fluorine-containing polybenzimidazole for high-temperature proton exchange membrane fuel cells." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/24594324213739993147.

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博士<br>國立成功大學<br>材料科學及工程學系碩博士班<br>96<br>First, an amorphous, organosoluble fluorine-containing polybenzimidazole (PBI) was synthesized from 3,3’-diaminobenzidine and 2,2-bis(4-carboxyphenyl)-hexafluoropropane. The 5 % weight loss temperature of the polymer is at 520 oC. In the methanol permeability measurement, the PBI membranes showed a lot better methanol barrier ability than the Nafion® membrane. The proton conductivity of the acid-doped PBI membranes increased with increasing temperatures and doping level of phosphoric acid in the polymer. The PBI membranes show higher proton conductivity t

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Li, Ching-Yi, and 李清宜. "Synthesis of Asymmetric Polyimides Containing Benzimidazole Substituent and their Applications on High Temperature Proton Exchange Membrane Fuel Cell." Thesis, 2014. http://ndltd.ncl.edu.tw/handle/w59n9d.

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碩士<br>國立臺灣科技大學<br>材料科學與工程系<br>102<br>A novel asymmetric diamine, 2-benzimidazolyl-4,4’-oxydianiline(6), containing a bulky benzimidazole side group and flexible ether linkage was synthesized successfully. And a series of novel polyimides (1Ben series) were prepared based on this novel diamine and the three kinds of dianhydrides by two steps method. Due to the rigid benzimidazole group, the novel polyimides exhibited excellent thermal stabilities. The glass transition temperatures (Tg) of the polyimides were between 277~342 ℃. The temperatures of 5 % weight loss (Td5%) were between 528~573 ℃. T

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WANG, FENG-YEN, and 王豐巖. "A Numerical Simulation on the Performance in the High Temperature Proton Exchange Membrane Fuel Cell with Serpentine Channel." Thesis, 2017. http://ndltd.ncl.edu.tw/handle/7vfk3p.

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碩士<br>南榮科技大學<br>工程科技研究所碩士班<br>105<br>A three-dimensional numerical model of multi-component mixture transport is presented and implemented in COMSOL Multiphysics to study the affections of the operation parameters and the physical properties on the performance and the electric fields in the high temperature proton exchange membrane fuel cell (PEMFC) with 0.7847mm×1.0mm×20mm. The modeled section of the high temperature PEMFC consist of the gas channels, the anode, the cathode, and the electrodes. The model contains the conservation of mass, momentum, species, and charge with electrochemical rea

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