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Tesis sobre el tema "Anion exchange polymer membrane"

Autor: Grafiati

Publicado: 12 de octubre de 2024

Última modificación: 31 de julio de 2025

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1

Panda, Ronit Kumar. "Développement d'un simulateur d'électrolyse alcalin avec membrane polymère échangeuse d'anions." Electronic Thesis or Diss., Université Grenoble Alpes, 2024. http://www.theses.fr/2024GRALI041.

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Cette thèse décrit la modélisation des performances AEMWE (chap 1) et ses dégradations (chap 2). Les modèles sont développés dans le code MePHYSTO développé au CEA dans la plateforme Matlab/Simulink. Le modèle de performance a été développé grâce aux caractérisations électrochimiques réalisées au CEA au cours du projet. Les phénomènes électrochimiques essentiels sont bien capturés, notamment l'effet de concentration en KOH et l'effet de couverture de bulles, et les courbes de polarisation sont correctement simulées.Concernant les dégradations, ces travaux s'appuient sur les résultats expérimen

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2

García, Cruz Leticia. "Electroorganic synthesis using a Polymer Electrolyte Membrane Electrochemical Reactor: electrooxidation of primary alcohols in alkaline medium." Doctoral thesis, Universidad de Alicante, 2016. http://hdl.handle.net/10045/61507.

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3

Thieu, Lam Mai. "Multiscale Tortuous Diffusion in Anion- and Cation-Exchange Membranes: Exploration of Counterions, Water Content, and Polymer Functionality." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/88849.

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Fundamental understanding of water transport and morphology is critical for improving ion conductivity in polymer electrolyte membranes (PEMs). Herein, we present comprehensive water transport measurements comparing anion-exchange membranes (AEMs) based on ammonium-functionalized poly(phenylene oxide) and cation-exchange membranes (CEMs) based on sulfonated poly(ether sulfone). We investigate the influence of counter ions, alkyl side chain, and degree of functionalization on water transport in AEMs and CEMs using pulsed-field-gradient (PFG) NMR diffusometry. Water diffusion in both AEMs and CE

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4

Bertolotti, Bruno. "Élaboration de membranes échangeuses d’anions à architecture réseaux interpénétrés de polymères pour des batteries lithium-air." Thesis, Cergy-Pontoise, 2013. http://www.theses.fr/2013CERG0676/document.

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Ce travail porte sur la synthèse et la caractérisation de membranes polymères échangeuses d'anions, destinées à la protection de l'électrode à air dans une batterie lithium-air (en vue d'une application pour véhicule électrique). Ces matériaux à architecture de réseaux interpénétrés de polymères (RIP) associent un réseau polyélectrolyte cationique hydrocarboné, la poly(épichlorohydrine) (PECH), à un réseau de polymère neutre qui peut être soit hydrocarboné, soit fluoré. Tout d'abord, la synthèse du réseau polyélectrolyte et son assemblage sur l'électrode à air ont été optimisés. Une première s

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5

Xu, Shaoyi. "SYNTHESIS OF PERFLUOROHETEROAROMATIC POLYMERS FOR ION-CONDUCTING MEMBRANE FUEL CELLS VIA FREE RADICAL-BASED REACTIONS AND SYNTHESIS OF DI-CATIONIC IONIC LIQUIDS AS EFFICIENT SO2 ABSORBENTS." OpenSIUC, 2016. https://opensiuc.lib.siu.edu/dissertations/1160.

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A novel free radical-based substitution reaction was developed for grafting aromatic/heteroaromatic compounds to perfluorosulfonic acid polymers (PFSAs). Two proton-exchange membranes perfluorobenzoic acid (PFBA) and perfluorobenzenesulfonic acid (PFBSA)—were synthesized for proton-exchange membrane fuel cells via the free radical-based reaction. The physical properties, in-plane ionic conductivities and fuel cell performance of two membranes were investigated. They exhibited different electrochemical and physical properties, possibly due to the formation of unique dimerized/trimerized structu

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6

Pasquini, Luca. "Ion - conducting polymeric membranes for electrochemical energy devices." Thesis, Aix-Marseille, 2015. http://www.theses.fr/2015AIXM4750.

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La recherche vise à proposer des membranes pour des dispositifs électrochimiques capables d'atteindre le bon compromis en terme de conduction ionique, de stabilité et de longue durée de vie pour une haute efficacité.Nous avons réalisé des membranes échangeuses des protons, d'anions ou amphotères à base de polymères aromatiques stables fonctionnalisés. Des groupes sulfonique on été introduit sur la squelette du PEEK, des groupes d'ammonium sur le PEEK et le PSU ou le deux au même temps pour échanger ensemble des protons et des anions.L'optimisation continue des paramètres de synthèse, le choix

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7

Catonné, Jean-Claude. "Contribution à l'étude du défaut de sélectivité présenté par les membranes échangeuses d'anions, dans le cadre de leurs applications au traitement électrochimique de régénération des solutions aqueuses d'acides minéraux." Paris 6, 1986. http://www.theses.fr/1986PA066030.

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Essai d'identification de l'origine de la "fuite h+" et de celle des différentes sources susceptibles d'alimenter le mouvement d'eau au sein des membranes échangeuses d'anions, selon que le matériau est fortement ou non "élusterisé", puis d'établissement de l'existence d'une corrélation étroite entre l'intensité de fuite protonique et celle de la perméabilité osmotique des membranes (ainsi que le laisse prévoir la théorie de Gierke dans le cas des membranes échangeuses de cations). Et enfin, évaluation du rôle du champ électrique, ainsi que celui de la composition de l'électrolyte sur les résu

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8

Wang, Lianqin. "Nanostructured Electrocatalysts for Anion Exchange Membrane Fuel Cells." Doctoral thesis, Università degli studi di Trieste, 2015. http://hdl.handle.net/10077/11107.

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2013/2014<br>Lo sviluppo sostenibile è una sfida prioritaria per la nostra società. La possibilità di costruire un futuro sostenibile, mantenendo al contempo alti standard nella qualità della vita e preservando risorse e ambiente, dipende dalla disponibilità di metodi per la produzione verde di energía e prodotti chimici. La produzione simultanea di prodotti chimici ed energía può essere ottenuta nelle celle a combustibile che impiegano combustibili liquidi (Direct Liquid Fuel Cells – DLFC), dispositivi in cui l’energia chimica contenuta nelle molecole di combustibile è convertita direttamente

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9

Santori, Pietro Giovanni. "Investigation of electrocatalysts for anion-exchange membrane fuel cells." Thesis, Montpellier, 2019. http://www.theses.fr/2019MONTS129.

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Cette thèse de doctorat étudie la synthèse, caractérisation structurale et activité pour la réaction de réduction de O2 (ORR) de catalyseurs Fe-N-C et de composites d’oxydes de manganèse supporté sur Fe-N-C, ainsi que leur utilisation en pile à combustible à membrane échangeuse d’anions (AEMFC). Tandis que les piles à membrane échangeuse de protons (PEMFC) requièrent aujourd’hui du platine dans ses catalyseurs pour atteindre des hautes performances, les piles AEMFC peuvent ouvrir la voie vers des piles sans métaux précieux. Si les catalyseurs Fe-N-C sont actuellement étudiés comme alternative

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10

Matsuoka, Koji. "Studies on direct alcohol fuel cells using anion-exchange membrane." 京都大学 (Kyoto University), 2005. http://hdl.handle.net/2433/144928.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(工学)<br>甲第11583号<br>工博第2529号<br>新制||工||1344(附属図書館)<br>23226<br>UT51-2005-D332<br>京都大学大学院工学研究科物質ｴﾈﾙｷﾞｰ化学専攻<br>(主査)教授小久見善八, 教授垣内隆, 教授田中功<br>学位規則第4条第1項該当

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11

Pathak, Sudhir Kumar. "Treatment of Landfill leachates using anion exchange resins." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/51812.

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Landfill leachates are often discharged to wastewater treatment plants (WWTPs) but their highly varied composition makes their treatment in WWTPs difficult. Landfill leachates contain bio-refractory organic matter which easily passes the biological treatment processes at WWTPs and increases the organic matter in the effluent. Leachates also interfere with the UV disinfection process at treatment plants. Another concern is the presence of large amounts of bio-refractory organic nitrogen in the leachates which makes it difficult for WWTPs to meet the tightening total nitrogen requirements. Stud

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12

Parker, Mark D. "Expression and anion transport studies on the human erythrocyte anion exchange protein (AE1, band 3) in the yeast Saccharomyces cerevisiae." Thesis, University of Bristol, 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.310589.

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13

Spiegel, Colleen. "Mathematical modeling of polymer exchange membrane fuel cells." [Tampa, Fla] : University of South Florida, 2008. http://purl.fcla.edu/usf/dc/et/SFE0002730.

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14

BONIZZONI, SIMONE. "Anion Conducting Polymers for Fuel Cell and Electrolyzer." Doctoral thesis, Università degli Studi di Milano-Bicocca, 2022. http://hdl.handle.net/10281/382284.

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The hydrogen, as energy vector, is considering one promising green, sustainable, low-cost alternative to hydrocarbon fuels. In the circular hydrogen economy, the fuel cell technologies play a crucial role of the energy conversion and, in particular, Anion Exchange Membrane Fuel Cell are retained to be very promising for the high-power delivery, the short waiting time before providing energy, the low working temperature. My PhD is focus on synthesis and characterization of anionic conducting polymer for fuel cell and electrolyzer applications. The first part of activities is focused on the stu

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15

Suzuki, Shohei. "Studies on Direct Ammonia Fuel Cells Employing Anion Exchange Membranes." 京都大学 (Kyoto University), 2016. http://hdl.handle.net/2433/215557.

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16

Dayama, Parth Omprakash. "A Comparative Study of Electrodes and Membranes for Anion Exchange Membrane Water Electrolysis Systems." Thesis, KTH, Tillämpad elektrokemi, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-300182.

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Vätgas kan framställas från förnybara energikällor genom vattenelektrolys med anjonbytande membran (AEMWE). AEMWE har vissa fördelar jämfört med traditionell alkalisk vattenelektrolys och elektrolysmed protonledande membran. Till exempel finns det möjlighet att använda alkalisk elektrolyt (även rent vatten) och billiga platinagruppsmetallfria katalysatorer tillsammans med ett anjonbytesmembran. Den största utmaningen med tekniken är att uppnå utmärkt och stabil prestanda för membran och elektroder. AemionTM anjonbytande membran (AEMs) av olika tjocklek, vattenupptag och kapacitet undersöktes i

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17

Park, Doh-Yeon. "Anion-conductive multiblock aromatic copolymer membranes: structure-property relationships." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/52172.

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Anion exchange membrane fuel cells (AEMFCs) are an alternative to proton exchange membrane fuel cells (PEMFCs) with potential benefits that include low cost (i.e., platinum-free), facile electro-kinetics, low fuel crossover, and use of CO-resistant metal catalysts. Despite these advantages, AEMFCs have not been widely used because they require more highly conductive anion exchange membranes (AEMs) that do not exhibit impaired physical properties. Therefore, the issues that this research is dealing with are to maximize conductivity and to improve chemical stability. As model materials for these

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18

Yu, Katayama. "Towards the realization of anion-exchange membrane fuel cell technology: potential of hydrogen-carrier utilization." Kyoto University, 2017. http://hdl.handle.net/2433/227631.

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19

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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20

Kim, Dohyun. "Micromachined chronocoulometric nitrate sensor and parallel-plate Donnan-dialytic sample-preparation system using anion-exchange membrane." Diss., Restricted to subscribing institutions, 2008. http://proquest.umi.com/pqdweb?did=1785254321&sid=2&Fmt=2&clientId=1564&RQT=309&VName=PQD.

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21

Hill, Melinda Lou. "Polymeric and Polymer/Inorganic Composite Membranes for Proton Exchange Membrane Fuel Cells." Diss., Virginia Tech, 2006. http://hdl.handle.net/10919/37597.

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Several types of novel proton exchange membranes which could be used for both direct methanol fuel cells (DMFCs) and hydrogen/air fuel cells were investigated in this work. One of the main challenges for DMFC membranes is high methanol crossover. Nafion, the current perfluorosulfonic acid copolymer benchmark membrane for both DMFCs and hydrogen/air fuel cells, shows very high methanol crossover. Directly copolymerized disulfonated poly(arylene ether sulfone)s copolymers doped with zirconium phosphates and phenyl phosphonates were synthesized and showed a significant reduction in methanol pe

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22

DE, BONIS CATIA. "Hybrid polymer electrolytes for proton exchange membrane fuel cells: synthesis and applications." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2009. http://hdl.handle.net/2108/1129.

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Le celle a combustibile con membrane a scambio protonico (PEMFCs) sono alternative sorgenti di energia che offrono numerosi vantaggi come l’alta efficienza, l’alta densità di potenza e la bassa emissione d’inquinanti. Esse sono impiegate nelle macchine ad idrogeno e nei dispositivi elettronici quali computer e cellulari alimentati con metanolo. La diffusione su larga scala di queste tecnologie punta sullo sviluppo di membrane a scambio protonico di nuova generazione, il cui costo di produzione sia compatibile con un mercato di massa. Tali conduttori protonici devono esibire una buona conducibi

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23

Sombatmankhong, Korakot. "The development and characterisation of microfabricated polymer electrolyte membrane fuel cells." Thesis, University of Cambridge, 2012. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.610026.

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24

Espiritu, Richard. "Polyethylene-based anion exchange membrane for alkaline fuel cell and electrolyser application : synthesis, characterisation and degradation studies." Thesis, University of Newcastle upon Tyne, 2017. http://hdl.handle.net/10443/3702.

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Alkaline anion exchange membranes (AAEM) have been fabricated using polyethylene as the base polymer offering a low cost AAEM for electrolyser and fuel cell applications. This study focused on the synthesis and characterisation of AAEM with controlled degree of grafting (DOG) and ion-exchange capacity (IEC) with the following parameters investigated: low density polyethylene (LDPE) film thickness 30-130 μm, gamma radiation dose and monomer concentration. The corresponding IEC, water uptake (WU) and degree of swelling (DS) are reported. The performance of 74.6% DOG membrane in a hydrogen fuel c

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25

Gcilitshana, Oko Unathi. "Electrochemical Characterization of Platinum based anode catalysts for Polymer Exchange Membrane Fuel Cell." Thesis, University of the Western Cape, 2008. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_5972_1266961431.

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<p>In this study, the main objective was to investigate the tolerance of platinum based binary anode catalysts for CO poisoning from 10ppm up to1000ppm and to identify the<br /> best anode catalysts for PEMFCs that tolerates the CO fed with reformed hydrogen.</p>

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26

Linares, Moya Douglas De Jesus. "Fundamental and applied studies on the development of an alkaline anion exchange membrane-based direct alcohol fuel cell." Thesis, University of Newcastle upon Tyne, 2012. http://hdl.handle.net/10443/1367.

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27

Shan, Yuyao Choe Song-Yul. "Dynamic modeling of polymer electrolyte membrane fuel cell stack with 1D and 2D CFD techniques." Auburn, Ala., 2006. http://repo.lib.auburn.edu/2006%20Summer/Theses/SHAN_YUYAO_58.pdf.

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28

Kannan, R. "Functionalized carbon nanotube based polymer composites as electrolytes in proton exchange membrane fuel cells." Thesis(Ph.D.), CSIR-National Chemical Laboratory, Pune, 2010. http://dspace.ncl.res.in:8080/xmlui/handle/20.500.12252/3752.

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29

Chen, Yuanxin. "POLYMER MEMBRANES FOR FLUE GAS CARBON CAPTURE AND FUEL CELL APPLICATION." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1440069742.

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30

Eaton, Brandon Michael. "One Dimensional, Transient Model of Heat, Mass, and Charge Transfer in a Proton Exchange Membrane." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/32788.

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A transient, one-dimensional, model of the membrane of a proton exchange membrane fuel cell is presented. The role of the membrane is to transport protons from the anode to cathode of the fuel cell while preventing the transport of other reactants. The membrane is modeled assuming mono-phase, multi-species flow. For water transport, the principle driving forces modeled are a convective force, an osmotic force (i.e. diffusion), and an electric force. The first of these results from a pressure gradient, the second from a concentration gradient, and the third from the migration of protons fro

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31

Du, Ling. "Highly Conductive Epoxy/Graphite Polymer Composite Bipolar Plates in Proton Exchange Membrane (PEM) Fuel Cells." University of Akron / OhioLINK, 2008. http://rave.ohiolink.edu/etdc/view?acc_num=akron1202345378.

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32

Marshall, Josiah. "Synthesis of the Diazonium Zwitterionic Polymer/Monomer for Use as the Electrolyte in Polymer Electrolyte Membrane (PEM) Fuel Cells." Digital Commons @ East Tennessee State University, 2021. https://dc.etsu.edu/etd/3968.

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My research goals are to synthesize new zwitterionic perfluorosulfonimide (PFSI) monomer/polymers. They are expected to replace traditionally used perfluorosulfonic acid (PFSA) polymers as the electrolyte in PEM fuel cells. For the PFSI monomer preparation, we designed a nine-step synthesis route. Thus far, I have successfully completed the synthesis of 4- (2-bromotetrafluoroethoxy)-benzenesulfonyl amide, 4-acetoxybenzenesulfonic acid sodium salt, and 4-chlorosulfonyl phenyl acetate. The coupling reaction of 4-(2-bromotetrafluoroethoxy)- benzenesulfonyl amide with 4-chlorosulfonyl phenyl aceta

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33

Pitia, Emmanuel Sokiri. "Composite Proton Exchange Membrane Based on Sulfonated Organic Nanoparticles." University of Akron / OhioLINK, 2012. http://rave.ohiolink.edu/etdc/view?acc_num=akron1339277956.

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34

Brunello, Giuseppe. "Computational modeling of materials in polymer electrolyte membrane fuel cells." Diss., Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/48937.

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Fuel cells have the potential to change the energy paradigm by allowing more efficient use of energy. In particular, Polymer Electrolyte Membrane Fuel Cells (PEMFC) are interesting because they are low temperature devices. However, there are still numerous challenges limiting their widespread use including operating temperature, types of permissible fuels and optimal use of expensive catalysts. The first two problems are related mainly to the ionomer electrolyte, which largely determines the operating temperature and fuel type. While new ionomer membranes have been proposed to address some of

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35

Gilbert, Patrick Gerard. "Synthesis and evaluation of new families of polymer electrolyte membranes for fuel cell applications." Thesis, Queen Mary, University of London, 2011. http://qmro.qmul.ac.uk/xmlui/handle/123456789/8523.

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Proton Exchange Membrane Fuel Cells (PEMFCs) are widely regarded as the next generation of portable power production devices, with uses ranging from powering automotive vehicles to laptops and smartphones. PEMFCs convert oxygen and hydrogen into water and usable electricity and have no moving parts, meaning that they can reach overall efficiencies of 60%. However current Polymer Electrolyte Membranes only work efficiently below 80 C and at high humidity. At this low temperature, CO poisoning of the Pt electrocatalysts means that only high-grade fuel (low CO concentration ≤ 2 ppm) and high cat

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36

Ahn, Jong-Woo. "Design and analysis of air and coolant control for a polymer electrolyte membrane fuel cell." Auburn, Ala., 2007. http://repo.lib.auburn.edu/07M%20Theses/AHN_JONGWOO_52.pdf.

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37

Alayyaf, Abdulmajeed A. "Synthesis of Two Monomers for Proton Exchange Membrane Fuel Cells (PEMFCs)." Digital Commons @ East Tennessee State University, 2016. https://dc.etsu.edu/etd/3015.

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The overall goal of this research is to synthesize two different monomers for proton exchange membrane (PEM) Fuel Cells. Such monomers are proposed to be polymerized to improve the efficiency and compatibility of electrodes and electrolytes in PEM fuel cells. The first target is to synthesize 4-diazonium-3-fluoro PFSI zwitterionic monomer. Three steps were carried out in the lab. First one was the ammonolysis of 3-fluoro-4-nitrobenzenesulfonyl chloride. Second reaction was the bromination of Nafion monomer. The next coupling reaction, between brominated Nafion monomer and the 3-fluoro-4-nitrob

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38

Kumar, Ravi. "An investigation of the composite polymer electrolytes and electrocatalysts for the proton exchange membrane fuel cell." Thesis, University of Newcastle upon Tyne, 2014. http://hdl.handle.net/10443/2417.

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Durability is one of the major issues for the successful commercialisation of polymer electrolyte membrane fuel cells (PEMFCs) and it mainly depends on the stability of the individual cell components. In order to minimise the durability issues, the development of new materials or modification to replace the existing fuel cell components is required. The typically used proton exchange membrane (PEM) is the perfluorosulfonated polymer such as Nafion® and electrocatalysts for PEMFC is high surface area carbon supported platinum electrocatalyst (Pt/C). A higher temperature of operation (>80 oC) of

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39

Oktar, Doganay Ceren. "Separation Of Chromate And Borate Anions By Polymer Enhanced Ultrafiltration From Aqueous Solutions Employing Specifically Tailored Polymers." Phd thesis, METU, 2007. http://etd.lib.metu.edu.tr/upload/3/12609178/index.pdf.

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In this study two polychelatogens for borate and a polyelectrolyte for chromate retention (R) were designed for investigating the effect of pH and loading (g metal /g polymer) on the separation performances of the synthesized polymers using continuous polymer enhanced ultrafiltration. Increase in pH increased the retention of borate for all of the synthesized polymers. Decrease in the loading resulted in an enhancement in boron retention with PNSM and PNSL. When COP was utilized, retentions remained almost constant after a certain loading, probably due to possible adverse ef

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40

Isikel, Lale. "Design and characterization of nonwoven fabrics for gas diffusion layer in polymer electrolyte membrane fuel cell." Auburn, Ala., 2007. http://repo.lib.auburn.edu/2007%20Spring%20Theses/ISIKEL_LALE_21.pdf.

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41

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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42

Mishra, Bikash. "Model development of a polymer electrolyte membrane fuel cell to predict steady and unsteady behavior." Diss., Mississippi State : Mississippi State University, 2008. http://library.msstate.edu/etd/show.asp?etd=etd-08132008-103611.

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43

Turtayeva, Zarina. "Genesis of AEMFC (anion exchange membrane fuel cell) at the lab scale : from PEMFC’s inks composition toward fuel cell bench tests in alkaline media." Electronic Thesis or Diss., Université de Lorraine, 2022. http://www.theses.fr/2022LORR0285.

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Les piles à combustible à membrane échangeuse d'anions (AEMFC) ont récemment attiré l'attention en tant que piles à combustible alternatives à faible coût aux piles à combustible à membrane échangeuse de protons traditionnelles en raison de l'utilisation possible d'électrocatalyseurs non-nobles. Bien que l'AEMFC ressemble à la PEMFC, les problèmes de gestion de l'eau sont plus prégnants dans une AEMFC car l'ORR en milieu alcalin nécessite de l'eau, tandis qu'en même temps, de l'eau est produite en grande quantité du côté de l'anode. Pour mieux comprendre la gestion de l'eau dans ce type de pil

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Pereira, Clotilde Coppini. "Desenvolvimento de membranas aniônicas obtidas por enxertia via irradiação para aplicação em células a combustível alcalinas." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/85/85134/tde-12062017-093623/.

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As membranas de troca aniônica são uma alternativa promissora para o desenvolvimento de eletrólitos mais eficientes para células a combustível alcalinas. Em geral, as membranas de troca aniônica são ionômeros capazes de conduzir íons hidroxila devido aos grupos quaternário de amônio e têm como característica elevado pH equivalente. Com o objetivo de desenvolver membranas aniônicas química e termicamente estáveis, com satisfatória condutividade iônica para aplicação em células a combustível alcalinas, as membranas aniônicas foram sintetizadas a partir de polímeros base de polietileno de baixa d

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45

Li, Yun. "Development of Biocompatible Polymer Monoliths for the Analysis of Proteins and Peptides." Diss., CLICK HERE for online access, 2009. http://contentdm.lib.byu.edu/ETD/image/etd3161.pdf.

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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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47

MARANI, DEBORA. "Development of hybrid proton-conducting polymers for proton exchange membrane fuel cells." Doctoral thesis, Università degli Studi di Roma "Tor Vergata", 2006. http://hdl.handle.net/2108/202679.

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Lo sviluppo di elettroliti polimerici di nuova generazione è un requisito essenziale per la diffusione su grande scala delle celle a combustibile a membrana polimerica. Tali conduttori protonici devono esibire stabilità morfologica, idrolitica, meccanica ed adeguate proprietà di conducibilità (σ~ 0.01 Scm-1) a temperature superiori a 100 °C per bassi valori d’umidità relativa. Nel presente lavoro sono esplorate diverse strategie per la sintesi di polimeri conduttori ibridi organici-inorganici nanocompositi a partire da polimeri termoplastici aromatici. L'impiego di materiali ibridi permette d

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48

Lindegren, Klara. "Evaluation of the Removal Efficiency of Per- and Polyfluoroalkyl Substances in Drinking Water using Nanofiltration Membranes, Active Carbon and Anion Exchange." Thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2015. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-268448.

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Per- and polyfluoroalkyl substances (PFASs) is a group of man-made, highly persistent chemicals. Due to the specific surface-active attributes of these molecules, applications are numerous and feed an economically important industry. During the last decade, PFASs have been detected globally in the environment, living organisms and tap water. The combination of toxic properties and high bioaccumulative potential, together with the discovery that conventional water treatment methods do not remove PFAS, renders further research on purification methods highly needed. Three techniques of purifying

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49

Caston, Terry Brett. "Design of a gas diffusion layer for a polymer electrolyte membrane fuel cell with a graduated resistance to flow." Thesis, Georgia Institute of Technology, 2010. http://hdl.handle.net/1853/34790.

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Due to escalating energy costs and limited fossil fuel resources, much attention has been given to polymer electrolyte membrane (PEM) fuel cells. Gas diffusion layers (GDLs) play a vital role in a fuel cell such as (1) water removal, (2) cooling, (3) structural backing, (4) electrical conduction and (5) transporting gases towards the active catalyst sites where the reactions take place. The power density of a PEM fuel cell in part is dependent upon how uniform the gases are distributed to the active sites. To this end, research is being conducted to understand the mechanisms that influence

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50

Ouahid, Soumia. "Transport facilité du glucose à travers une membrane échangeuse d'anions avec l'ion borate comme transporteur." Rouen, 1994. http://www.theses.fr/1994ROUES029.

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Par couplage diffusion-réaction, le transport d'un substrat non ionique à travers une membrane échangeuse d'ions, peut être facilité en choisissant un contre-ion apte à réagir réversiblement avec le substrat. Dans ce travail, nous avons réalisé le transport facilité à travers une membrane échangeuse d'anions. L'ion borate était utilisé comme transporteur et sa teneur dans la membrane était fixée par l'activité de l'acide borique. Nous avons mené simultanément la modélisation et l'expérimentation du transport. Par des études d'équilibre et de conductivité, nous avons déterminé les paramètres ph

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