| 摘要 |
PURPOSE:To obtain a better heavy-load discharge characteristic by using a positive electrode mix consisted of chemical synthetic manganese dioxide powder, a positive electrode active material and an electrolyte holding material which doubles as a conductive auxiliary material. CONSTITUTION:The inside of a bottomed cylindrical zinc can 1 which doubles as a negative electrode is filled with a positive electrode mix 3 through a separator 2. This positive electrode mix 3 is consisted of a positive electrode active material made up of a mixture of chemical synthetic manganese dioxide powder mainly composed of gamma(gamma) type crystal made up by acid treatment of manganese oxide produced by roasting manganese sulfate and electrolytic manganese dioxide powder and an electrolytic holding material which doubles as a conductive auxiliary material made up of oil furnace black whose hydrochloric acid absorption quantity according to JIS K1469 is 4-6ml/g. It is thereby possible to get a better heavy-load discharge characteristic than the case where electrolytic manganese dioxide powder is used as positive electrode active material. |
