Cathode with alloy of nickel or cobalt and platinum group...

Details Cathode with alloy of nickel or cobalt and platinum group... Cathode with alloy of nickel or cobalt and platinum group...

C - Chemistry, Metallurgy

25

B

117/101, 204/192

C25B 11/08 (2006.01) C25B 11/04 (2006.01) H01M 4/98 (2006.01)

Patent

CA 1225614

ABSTRACT OF THE DISCLOSURE A cathode having high durability and low hydrogen overvoltage comprising an electrode substrate and a porous alloy layer formed thereon, characterized in that said porous alloy layer has an electrical double layer capacity of at least 1000µF/cm2 and is made of an alloy comprising Component X selected from the group consisting of nickel, cobalt and a mixture thereof, Component Y selected from the group consisting of aluminum, zinc, magnesium and silicon, and Component Z selected from the group consisting of a platinum group metal and rhenium, and having a composition of Components X, Y and Z falling within the range defined by the following points A, B, C and D with reference to the diagram of Figure 1: A: X = 99.6 wt.%, Y = 0 wt.%, Z = 0.4 wt.% B: X = 79.6 wt.%, Y = 20 wt.%, Z = 0.4 wt.% C: X = 10 wt.%, Y = 20 wt.%, Z = 70 wt.% D: X = 12.5 wt.%, Y = 0 wt.% Z = 87.5 wt.%

432570

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