Electrode for solid polymer electrolyte fuel cell

H - Electricity – 01 – M

Patent

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Details

H01M 4/88 (2006.01) H01M 4/86 (2006.01) H01M 4/90 (2006.01) H01M 8/10 (2006.01) H01M 4/92 (2006.01)

Patent

CA 2427497

An electrode for solid polymer type fuel cells which contains a catalyst layer comprising electrode catalyst particles (3), a support (4) therefor, and proton-conductive polymers (1) and (2), wherein the proton-conductive polymer (1) is present in such a primary state that at least part of the particles (3), support (4), or both is coated with the polymer (1), the proton- conductive polymer (2) is present in such a secondary state that the particles (3) or the support (4) is bonded to one another and to the solid polymer electrolyte film with the polymer (2), and the polymer (1) has a lower melt viscosity than the polymer (2).

L'invention concerne une électrode destinée à des cellules électrochimiques du type à polymère solide. Cette électrode comprend une couche catalytique renfermant des particules catalytiques d'électrode (3), un support (4) associé ainsi que des polymères conducteurs de protons (1 et 2). Le polymère conducteur de protons (1) est présent dans un premier état, une partie au moins des particules (3) et/ou du support (4) étant revêtue de ce polymère (1). Le polymère conducteur de protons (2) est présent dans un second état, les particules (3) et le support (4) étant associés l'un à l'autre et liés au film d'électrolyte à polymère solide comprenant le polymère (2). Le polymère (1) présente une viscosité à l'état fondu inférieure à celle du polymère (2).

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