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US 4,391,668 AGranted
Mixed oxide oxygen electrode
AssigneeHer Majesty the Queen in right of Canada, as represented by the Minister of National Defence
InventorWilliam A. Armstrong
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Abstract
The invention disclosed is a novel method for the preparation of a nickel/cobalt oxide impregnated nickel plaque material involving a single oxidation step. The nickel plaque material is cleaned, impregnated with an aqueous cobalt nitrate solution and dried. The nickel/cobalt oxide is then formed in a single oxidation step.
Claims9
A method for the preparation of a nickel/cobalt oxide impregnated nickel plaque material, comprising
- (a) providing a substantially oxide free sintered nickel plaque material;
- (b) dipping the nickel plaque in an aqueous solution of cobalt nitrate and polytetrafluoroethylene as a wet-proofing agent;
- (c) drying the cobalt nitrate impregnated plaque so formed;
- and
- (d) heat treating at about 200.degree. to about 250.degree. C. for about 1 to 8 hours, to form the nickel/cobalt oxide impregnated nickel plaque material.
2 more elements
A method for the preparation of a nickel/cobalt oxide impregnated nickel plaque material, comprising the steps of:
- (a) providing a substantially oxide-free sintered nickel plaque material;
- (b) dipping the nickel plaque in an aqueous solution of cobalt nitrate;
- (c) drying the cobalt nitrate impregnated plaque so formed;
- (d) heat treating at about 200.degree. to 250.degree. C. for about 1 to 8 hours, to form the nickel/cobalt oxide impregnated nickel plaque material;
- (e) covering one side of the plate with a polytetrafluoroethylene membrane;
- (f) cold pressing the membrane onto the plate;
- (g) exposing the other side of the plate to aqueous cobalt nitrate and polytetrafluoroethylene solution;
- (h) drying the plate;
- (i) removing the polytetrafluoroethylene covering from said one side of the plate;
- (j) heat treating the plate at about 250.degree. C. for about 3 hours, to form a plate wet-proofed only on said other side of the plate;
- (k) covering the wet-proofed side of the plate with a polytetrafluoroethylene membrane;
- and
- (l) hot-pressing the membrane onto the plate.
10 more elements
Dependencies are inferred from the claim text.