| abstract |
(57) [Summary] [Structure] Li: Mn atomic ratio of lithium hydroxide or lithium salt to manganese dioxide 1:99 to 30:70, preferably 10:90 to 22:78, more preferably 12: The mixture of 88 to 17:83 is heat-treated at 170 to 280 ° C, preferably 220 to 260 ° C, and pulverized to obtain a powder of the positive electrode material. [Effect] Since the specific powder having a higher capacity than that of the conventional manganese dioxide powder is used as the positive electrode material, the battery of the present invention has a large capacity. |