Fdk Corporation

Syouhei Unoki

A batteryincludes: a container; and an electrode grouphoused in the containertogether with an alkaline electrolyte liquid. The electrode groupincludes a nickel electrodeas a positive electrode and a negative electrodethat are combined with a separatorinterposed therebetween. The nickel electrodeincludes a positive electrode core and a positive electrode mixture permeated in the positive electrode core. The positive electrode mixture contains nickel hydroxide that is a positive electrode active material. The nickel hydroxide contains a sulfate salt, and a weight rate of a S component contained in the sulfate salt to a Ni component in the nickel hydroxide is 0.28% or more and 1.50% or less.

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Tokyo, Japan

Syouhei Unoki