| abstract |
(57) [Summary] [Purpose] To provide a method for manufacturing a nickel-hydrogen storage battery capable of suppressing the capacity reduction after long-term storage without increasing the amount of cobalt oxide compounded in the positive electrode. is there. [Structure] A non-sintered nickel positive electrode containing nickel oxide and cobalt oxide and RNixxy Co x A y (wherein R is at least one element selected from rare earth elements including La and Y or a misch metal, and A is Al, M At least one selected from n, Ti, Cu, Zn, Zr, Cr, and P, and t, x, and y each have an atomic ratio of 4.5. ≦ t ≦ 5.5, x ≧ 0.4, and 0 ≦ y ≦ 2.0), and a separator made of a polymeric nonwoven fabric is interposed between the negative electrodes containing the hydrogen storage alloy to insulate. The method is characterized by including a step of producing an electrode group by, a step of housing the electrode group together with an alkaline electrolyte in a closed container, and a step of performing initial charging at a high temperature. |