Mitsui Minings & Melting Co., Ltd.

Matsushita Electric Industrial Co., Ltd.

Matsushita Electric Indus. Co. Ltd.

Toyohide Uemura

Junichi Asaoka

Tomotaka Motomura

Shuji Tsuchida

Tomiko Yamaguchi

Kanji Takata

Keiichi Kagawa

Akira Miura

Kazuhide Miyazaki

Ryoji Okazaki

Katsuzo Nakaso

A non-amalgamated zinc alloy powder for use in an alkaline cell which consists of elements component selected from among the following combinations (1) to (3):

Zinc alloy powder for alkaline cell and method for production of the same

A non-amalgamated zinc alloy powder for use in an alkaline cell which comprises 1 ppm or less of iron and an elemental component selected from among the following combinations (1) to (5):

This invention uses as the anode active material a zinc alloy containing Ni, at least one element selected from In, Pb, Ga and Cd and, optionally further, one element selected from Al, Mg, Ca, Ba and Sr for the anode of a conventional zinc-alkaline battery which employs zinc as the anode active material, aqueous alkaline solution as the electrolyte, and manganese dioxide, silver oxide, oxygen and so forth as the cathode active material. The use of such zinc alloy permits the reduction of the amount of mercury to be used for amalgamation of the anode zinc surface which is made for the purpose of corrosion inhibition, thereby enabling the provision of a low-pollution zinc-alkaline battery.

Zinc-alkaline battery

Anode active materials comprising amalgamated zinc powder for use in cells, which may well achieve inhibition of corrosion of zinc with a smallest possible amount of mercury, may be produced by a process comprising atomizing a molten zinc added with mercury to obtain pre-amalgamated zinc powder and bringing thus obtained powder, which is dispersed in a liquid, into contact with mercury or an amalgam to further amalgamate said pre-amalgamated zinc powder.

Process for the production of anode active materials for use in cells

Growing community of inventors

Takehara, Japan

Toyohide Uemura