Toshiba Battery Co., Ltd.

Yukihiro Ito

Kazunari Kobayashi

An alkaline dry cell includes an anode inside a cathode. The anode includes a metal anode current collector inside an gel anode, which has zinc alloy powder as an active material. The cathode includes a cathode depolarizing mixture, which has electrolytic manganese dioxide as an active material, in a closed-end metal cathode can. Small amounts of the active materials can be used economically. A theoretical capacity ratio (N,/P,) between the anode and the cathode is in a range of 1.0 to 1.20. A contact area ratio (P,/N,) between an anode-opposed area of the cathode depolarizing mixture and a contact area of the anode current collector against the gel anode is in a range of 1.82 to 8.24. A short charge-up time makes the alkaline dry cell suitable to power the flash of a camera.

Growing community of inventors

Takasaki, Japan

Yukihiro Ito