Fdk Corporation

Yuya Tanimoto

Masaru Kihara

Tetsuya Yamane

Yuzo Imoto

Hideyuki Asanuma

A batteryincludes an outer canand an electrode groupthat is housed in the outer cantogether with an alkaline electrolytic solution, in which a positive electrodeincluded in the electrode groupincludes a positive electrode substrate and a positive electrode mixture supported on the positive electrode substrate, the positive electrode mixture includes nickel hydroxide and a positive electrode additive, the positive electrode additive includes a titanium oxide particle having an anatase-type crystal structure, the titanium oxide particle has an average primary particle size of 5 nm or more and 10 nm or less and a BET specific surface area of 230 m/g or more and 360 m/g or less, and includes 0.1% by mass or more of niobium, and a rate of addition of the titanium oxide relative to the nickel hydroxide is 0.1% by mass or more and 1.0% by mass or less.

Positive electrode for alkali secondary battery and alkali secondary battery including said positive electrode

A batteryincludes an outer canand an electrode groupthat is housed in the outer cantogether with an alkaline electrolytic solution, in which a positive electrodeincluded in the electrode groupincludes a positive electrode substrate and a positive electrode mixture supported on the positive electrode substrate, the positive electrode mixture includes nickel hydroxide, yttrium oxide serving as a first additive, and niobium oxide or titanium oxide serving as a second additive, a total amount of the first additive and the second additive is 0.1 parts by mass or more and 2.5 parts by mass or less per 100 parts by mass of the nickel hydroxide, a mass ratio of the first additive and the second additive is in a relationship of 1:0.2 to 5, and the positive electrode mixture after an activation treatment has a resistivity of 1 Ω·m or more and 10 Ω·m or less.

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Tokyo, Japan

Yuya Tanimoto