Matsushita Electric Industrial Co., Ltd.

Shinichi Sumiyama

Michiko Fujiwara

Shigeto Noya

Yasuko Hoshina

Yuji Mototani

Yasuo Mukai

Takeshi Okubo

Shuji Fujiwara

In order to obtain an alkaline dry battery low in the possibility of electrolyte leakage and excellent in discharge performance as well as an alkaline dry battery which is not likely to cause an internal short circuit even with the use of a thin separator, as a zinc powder used is one including 65 to 75 wt % of first zinc particles having a particle size of larger than 75 &#x3bc;m and not larger than 425 &#x3bc;m, and 25 to 35 wt % of second zinc particles having a particle size of not larger than 75 &#x3bc;m.

Alkaline dry battery

The present invention provides an alkaline battery having good heavy-loading discharge characteristics even after long-term storage at high temperatures. The alkaline battery of the present invention comprises a positive electrode containing manganese dioxide and nickel oxyhydroxide as an active material, a negative electrode containing zinc as an active material, and an alkaline electrolyte. The positive electrode further contains at least one compound selected from the group consisting of an oxygen-containing zinc compound, an oxygen-containing calcium compound, an oxygen-containing yttrium compound, and an oxygen-containing titanium compound.

Alkaline battery

Growing community of inventors

Hirakata, Japan

Shinichi Sumiyama