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Poster: Aspects of utilization of conducting polymers in the PEM type fuel cells.

The result's identifiers

  • Result code in IS VaVaI

    <a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22310%2F05%3A00013981" target="_blank" >RIV/60461373:22310/05:00013981 - isvavai.cz</a>

  • Result on the web

  • DOI - Digital Object Identifier

Alternative languages

  • Result language

    angličtina

  • Original language name

    Poster: Aspects of utilization of conducting polymers in the PEM type fuel cells.

  • Original language description

    The aim of this paper is to discuss main aspects of the application of Conducting Polymers (CPs) in the development of Proton Exchange Membrane (PEM) type fuel cells. Present state of the art of the fuel cells technology suffers from several serious problems, the most important being low catalyst utilization, catalyst sensitivity to CO chemisorption and membrane permeability to fuel. Several ways are proposed in the literature to solve these problems, one of them being the application of CPs.As it has been shown, permeability of CP to the methanol can be as much as three orders of magnitude lower. This highly positive aspect, however, has to be considered carefully. This is because of two aspects. First of all, we have to consider CP film permeabilityto methanol being closely connected with its permeability to the water. In this case formation of the CP barrier layer on the top of the membrane would result not only in the reduction of the methanol cross over rate, but also in a seriou

  • Czech name

    Poster: Aspects of utilization of conducting polymers in the PEM type fuel cells.

  • Czech description

    Jak bude ukázáno v rámci této práce, permeabilita CP filmu pro methanol je o tři řády nižší ve srovnání se samotnou membránou Nafion. Tento pozitivní aspekt se však v jiném úhlu pohledu může stát negativním. Snížená propustnost CP filmu pro methanol budespojena se snížením propustnosti pro vodu. V takové případě vznik bariérové CP vrstvy na povrchu membrány může vést k narušení vodného režimu uvnitř membrány. Druhý problém je spojen s permeabilitou CP filmu pro proton vznikající během reakce na anodě.V posledních letech byla v naší laboratoři zahájena studie zabývající se tímto problémem. Permeabilta CP filmu pro vodík a proton je o dva řády nižší ve srovnání s tenkou vrstvou Nafionu nanesenou na elektrodě.

Classification

  • Type

    O - Miscellaneous

  • CEP classification

    CG - Electrochemistry

  • OECD FORD branch

Result continuities

  • Project

  • Continuities

    Z - Vyzkumny zamer (s odkazem do CEZ)

Others

  • Publication year

    2005

  • Confidentiality

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