Hydrogen-occulusion electrode

Details Hydrogen-occulusion electrode Hydrogen-occulusion electrode

1993-06-10

1994-11-01

Gorgos, Kathryn

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

204291, H01M 462

Patent

active

053606876

ABSTRACT:
A hydrogen-occlusion electrode and a method of manufacturing the electrode are described. The hydrogen-occlusion electrode comprises from about 42-84 vol. % of a hydrogen-occlusion alloy, from about 3-13 vol. % of a bonding material where the volume percent is based on 100% from about 3-15 vol. % of an electroconductive material, and has residual pores in an amount of 10-30 vol. %. The electroconductive material has an average particle size of 1.3 .mu.m or less. The bonding material is preferably polyvinylidene flouride (PVdf). In manufacturing the foregoing hydrogen-occlusion electrode, a formed electrode plate body including PVdF as a bonding material is heat-treated in a vacuum or inert gas atmosphere at a temperature ranging from about 160.degree. C. to about 200.degree. C. An electrode is thereby obtained wherein the alloy particles are prevented from separating from the electrode resulting in an improvement of mechanical strength and electroconductivity in the electrode. When the hydrogen-occlusion electrode includes a thickener in an amount of not more than about 0.5 wt. % based on the weight of the hydrogen-occlusion alloy, improvements in the charge-discharge characteristics and the internal pressure of the battery are obtained.

REFERENCES:
patent: 4710335 (1987-12-01), Kita et al.
patent: 5053292 (1991-10-01), Hasebe et al.
Patent Abstracts of Japan, vol. 17, No. 89, JP-A-42 82 559 7 Oct. 1992.
Derwent Abstract AN 80-32121C, JP-A-50 135 534, 27 Oct. 1975.
Patent Abstracts of Japan, vol. 13, No. 88, JP-A-63 266 768 2 Nov. 1988.

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