Fuel cell cathode

Details Fuel cell cathode Fuel cell cathode

H - Electricity

01

M

319/16

H01M 4/86 (2006.01) H01M 4/90 (2006.01)

Patent

CA 1195378

ABSTRACT . A cathode for oxygen reduction in a fuel cell is formed from a host matrix including at least one transition metal element which is structurally modified by the incorporation of at least one modifier element to enhance its catalytic proper- ties. The catalytic body is based on a disordered non-equilibrium material designed to have a high density of catalytically active sites, resistance to poisoning and long operating life. Modifier elements, such as La, Al, K, Cs, Na, Li, C, and O structurally modify the local chemical environ- ments of a host matrix including one or more transi- tion elements such as Mn, Co and Ni to form the catalytic materials of the cathode. The catalytic materials can be deposited as a layer on the sur- face of a porous electrode substrate to form a gas diffusion cathode or can be formed as a gas diffu- sion electrode.

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