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

Abstract

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.