Nickel-Metallhydridsekundärzelle.

摘要

A nickel-metal hydride secondary cell comprising a non-sinter type nickel positive electrode (1) accommodated in an enclosure (4) and comprised of a conductive core and a layer formed on the conductive core, the layer made of a mixture of nickel hydroxide powder and cobalt monoxide powder covered with a layer of high-valence cobalt oxide, a hydrogen absorbing alloy negative electrode (2) accommodated in the enclosure (4) and comprised of a conductive core and a layer formed on the conductive core and made of a mixture hydrogen absorbing alloy powder and carbon black having a specific surface area of 700 m<2>/g or more, and having a capacity 1.0 to 2.5 times the sum of the capacity of the nickel hydroxide contained in the positive electrode (1) and the electricity required to oxidize the cobalt monoxide powder, a separator (3) made of synthetic resin unwoven fabric having a texture size of 50 to 100 g/m<2> and a thickness of 0.1 to 0.25 mm, and located between the positive electrode (1) and the negative electrode (2), and alkali electrolyte contained in the enclosure (4).