| abstract |
(57) [Problem] To provide a method for producing a nickel positive electrode, which can reduce a discharge reserve and obtain a high active material utilization rate. SOLUTION: A layer of cobalt hydroxide is formed on the surface of positive electrode active material particles, and the positive electrode material is formed by combining a part of cobalt hydroxide in the layer and a part of nickel hydroxide in the positive electrode active material. As oxidized, oxidize, the positive electrode material into a paste, apply the paste to the current collector to produce a positive electrode body, The positive electrode body is disposed in the electrolytic solution together with the counter electrode, and the positive electrode body and the counter electrode are charged. A first step is performed at 40 to 80 ° C. -60 mV to 40 with respect to the mercury oxide electrode at a temperature of The constant current charging is performed to a predetermined potential in the range of 0 mV. 0%, additional charge. |