Hydrogen-absorbing alloy electrode for metal hydride alkaline ba

Details Hydrogen-absorbing alloy electrode for metal hydride alkaline ba Hydrogen-absorbing alloy electrode for metal hydride alkaline ba

1995-11-22

1997-05-13

Nuzzolillo, M.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

429 59, 429101, 429223, 429224, 296235, 420900, H01M 402

Patent

active

056290004

ABSTRACT:
A hydrogen-absorbing alloy electrode for metal hydride alkaline batteries uses as hydrogen-absorbing material a powder of a rare earth element-nickel hydrogen-absorbing alloy obtained by pulverizing thin strips of said alloy prepared by single roll process and having an average thickness of 0.08 to 0.35 mm and a minimum size of crystal grains present in the roll-surface size of at least 0.2 .mu.m and a maximum size of crystal grains in the open-surface side of not more than 20 .mu.m. A process for producing the above electrode is also provided. The electrode can provide, when used as negative electrode, metal hydride alkaline batteries which are excellent in both high-rate discharge characteristics at an initial period of charge-discharge cycles and charge-discharge cycle characteristics.

REFERENCES:
patent: 5219678 (1993-06-01), Hasebe et al.
patent: 5376474 (1994-12-01), Tadokoro et al.
patent: 5441826 (1995-08-01), Watanabe et al.

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