Bipolar plate assembly, fuel cell stacks and fuel cell...

H - Electricity – 01 – M

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H01M 8/24 (2006.01) C23F 1/00 (2006.01) H01M 8/02 (2006.01) H01M 8/06 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2483224

A fuel cell assembly 16~~ including bipolar plate assemblies (60, 64) on opposite sides of MEA (62). The MEA having anode (66), cathode (68), an electrolyte (70) and catalysts (74, 76) each disposed between the electrolyte and a respective gas diffusion layer (78). The bipolar plates having flow fields (87), namely anode flow fields 88~ and cathode flow fields 90~, with the flow fields having one or more channels (92) defined at least in part by sidewalls (94) and bottom (96).

L'invention concerne un ensemble de cellules électrochimiques (16'') comportant des ensembles de plaques bipolaires (60, 64) sur des côtés opposés de l'ensemble d'électrodes à membranes (MEA) (62). Ledit ensemble d'électrodes à membranes comporte une anode (66), une cathode (68), un électrolyte (70) et des catalyseurs (74, 76) tous disposés entre l'électrolyte et une couche de diffusion gazeuse respective (78). Les plaques bipolaires présentent des champs de flux (87), c.-à-d. des champs de flux d'anode (88') et des champs de flux de cathode (90'), lesdits champs de flux comportant un ou plusieurs canaux (92) définis au moins partiellement par des parois latérales (94) et des fonds (96).

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