Role of Liquid Water Properties for Enhancement of Hydrogen Fuel Cell Efficiency

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F49777513%3A23640%2F13%3A43920016" target="_blank" >RIV/49777513:23640/13:43920016 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Role of Liquid Water Properties for Enhancement of Hydrogen Fuel Cell Efficiency

Popis výsledku v původním jazyce

The irreversible thermodynamics is used to analyze transport processes inside an operating fuel cell. Specifically, we analyzed the relation between water diffusion, proton conductivity, water concentration inside the PEM (Polymer Electrolytic Membrane)and the transport processes in porous catalyst layers. Comparisons of the analysis with experiments leads to: i) an estimate of the influence of water surface tension on water diffusion flux through the PEM (Nafion and its modification ?doping by ZrO2 ,thermal processing, etc.) ii) an estimate of the changes of proton conductivity in the small membrane pores (the width of which is approx. 3-5nm), determining the most effective mechanism of the positive charge transport.

Název v anglickém jazyce

Role of Liquid Water Properties for Enhancement of Hydrogen Fuel Cell Efficiency

Popis výsledku anglicky

The irreversible thermodynamics is used to analyze transport processes inside an operating fuel cell. Specifically, we analyzed the relation between water diffusion, proton conductivity, water concentration inside the PEM (Polymer Electrolytic Membrane)and the transport processes in porous catalyst layers. Comparisons of the analysis with experiments leads to: i) an estimate of the influence of water surface tension on water diffusion flux through the PEM (Nafion and its modification ?doping by ZrO2 ,thermal processing, etc.) ii) an estimate of the changes of proton conductivity in the small membrane pores (the width of which is approx. 3-5nm), determining the most effective mechanism of the positive charge transport.

Druh

O - Ostatní výsledky

CEP obor

BJ - Termodynamika

OECD FORD obor

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Projekt

<a href="/cs/project/ED2.1.00%2F03.0088" target="_blank" >ED2.1.00/03.0088: Centrum nových technologií a materiálů (CENTEM)</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2013

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů