Hydrogen-occlusion electrode and a method of manufacturing the e

Details Hydrogen-occlusion electrode and a method of manufacturing the e Hydrogen-occlusion electrode and a method of manufacturing the e

1994-07-14

1995-11-07

Kalafut, Stephen

Coating processes

Electrical product produced

Metal coating

296235, H01M 404

Patent

active

054646545

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, 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 fluoride (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: 5053292 (1991-10-01), Hasebe et al.
patent: 5100747 (1992-03-01), Hayashida et al.
patent: 5238756 (1993-08-01), Fetcenko et al.

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