Chikara Kasai

US Patent:

59811080, Nov 9, 1999

Filed:

Sep 18, 1997

Appl. No.:

8/933325

Inventors:

Jun Matsumura - Otsu, JP
Kuninori Omura - Kamakura, JP
Chikara Kasai - Chula Vista CA
Sadaaki Yokoh - Yokohama, JP
Hitoshi Mikuriya - Chigasaki, JP

Assignee:

Matsushita Electric Industrial Co, Ltd. - Osaka-fu

International Classification:

H01M 426
H01M 470

US Classification:

429233

Abstract:

An electrode for a battery with small variations in the discharge capacity and excellent reliability is disclosed. It comprises a sheet of porous metal substrate having three-dimensional communicating spaces for containing an active material. The substrate has a layer filled with the active material and occupying most of the thickness of the electrode, and a layer of current collector composed of a metallic foil which is not filled with active material and has reduced porosity.