Fuel cell bipolar plate, process for producing the same, and...

H - Electricity – 01 – M

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H01M 8/02 (2006.01) H01M 8/10 (2006.01)

Patent

CA 2636487

A fuel cell separator that while retaining its mechanical strength, has its electrical conductivity enhanced; a process for producing the same; and a fuel cell including the separator. There is provided a fuel cell separator comprising laminated molded item (1) of sheet-shaped molding material, wherein the sheet-shaped molding material contains a resin and a carbon material, and wherein the laminated molded item (1) has a laminate structure of, arranged in sequence, surface layer C(11)/interlayer B(12)/central layer A(13)/ interlayer B~(14)/ surface layer C~(15), and wherein each of the central layer A(13), interlayer B(12), interlayer B~(14), surface layer C(11) and surface layer C~(15) consists of a single layer or multilayer of the sheet-shaped molding material, and wherein when the carbon material content of central layer A(13) is referred to as a, the carbon material content of interlayer B(12) as b, the carbon material content of interlayer B~(14) as b~, the carbon material content of surface layer C(11) as c and the carbon material content of surface layer C~(15) as c~, there are satisfied the relationships 55<=a<=85, 55<=c<=85, 55<=c~<=85, 10<=a-b<=30, 10<=c-b<=30, 10<=a-b~<=30 and 10<=c~- b~<=30 (the unit of each of a, b, b~, c and c~ is % by volume).

Séparateur pour pile à combustible qui, tout en conservant sa résistance mécanique, voit sa conductivité électrique renforcée ; processus pour sa production ; et pile à combustible comprenant ledit séparateur. Le séparateur pour pile à combustible selon l'invention comporte un article (1) moulé stratifié de matériau de moulage en forme de feuille, ledit matériau de moulage en forme de feuille contenant une résine et un matériau au carbone, et l'article (1) moulé stratifié présentant une structure stratifiée comprenant, disposées en séquence, une couche superficielle C(11) / une couche intercalaire B(12) / une couche centrale A(13) / une couche intercalaire B'(14) / une couche superficielle C'(15), chacune des couche centrale A(13), couche intercalaire B(12), couche intercalaire B'(14), couche superficielle C(11) et couche superficielle C'(15) étant constituée d'une couche unique ou de couches multiples du matériau de moulage en forme de feuille, la teneur en matériau au carbone de la couche centrale A(13) étant notée a, la teneur en matériau au carbone de la couche intercalaire B(12) étant notée b, la teneur en matériau au carbone de la couche intercalaire B'(14) étant notée b', la teneur en matériau au carbone de la couche superficielle C(11) étant notée c et la teneur en matériau au carbone de la couche superficielle C'(15) étant notée c', celles-ci satisfaisant les relations 55=a=85, 55=c=85, 55=c'=85, 10=a-b=30, 10=c-b=30, 10=a-b'=30 and 10=c'-b'=30 (l'unité de chacune des teneurs a, b, b', c et c' étant le % en volume).

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