Bifunctional metal-air electrode

Details Bifunctional metal-air electrode Bifunctional metal-air electrode

1992-10-30

1994-04-26

Willis, Jr., Prince

Chemistry: electrical current producing apparatus, product, and

Having earth feature

429 42, 429 44, H01M 492

Patent

active

053065794

ABSTRACT:
A bifunctional air-electrode for use in electrochemical energy cells discharges a satisfactory current on the first discharge cycle and operates for a relatively large number of charge-discharge cycles without gas forming between the electrolyte side of the air electrode and the electrolyte. The active layer of the electrode includes an oxygen reduction catalyst having a first oxygen evolution potential and an oxygen evolution catalyst having a second oxygen evolution potential less than the first oxygen evolution potential, the oxygen reduction catalyst being present in a greater concentration proximate the electrolyte side than proximate the air side and the oxygen evolution catalyst being present in a greater concentration proximate the air side than proximate the electrolyte side.

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