Sanyo Electric Co., Ltd.

Syuichi Suzuki

Shin Fujitani

Koji Nishio

Mutsumi Yano

Mitsunori Tokuda

Mitsuzou Nogami

Mamoru Kimoto

Ikuo Yonezu

Reizo Maeda

A sealed alkaline storage battery using, as a positive electrode active material, nickel oxyhydroxide including Mn as a solid-solution element and having a &ggr; ratio of 65 through 100%; a sealed alkaline storage battery using, as a positive electrode active material, nickel oxyhydroxide including as an additive or coated with a rare earth element and/or a rare earth compound in a ratio measured based on the rare earth element of 0.05 through 5 wt %; and a sealed alkaline storage battery including, as a positive electrode active material, nickel oxyhydroxide having a half-width of a peak in a lattice plane (003) in an X-ray diffraction pattern of 0.8&deg; or more. The pressure within the battery is not largely increased for a long period of charge-discharge cycles, and hence, the electrolyte hardly leaks.

Sealed alkaline storage battery

Enclosed alkali storage battery

Alkaline storage battery and method for charging battery

Growing community of inventors

Hirakata, Japan

Syuichi Suzuki