| 摘要 |
PROBLEM TO BE SOLVED: To suppress the amount of elution of manganese and to improve high temp characteristics of a battery, such as preservability and cycle characteristic at high temp., by neutralizing electrolytically deposited manganese dioxide with a potassium compound to control pH and, after mixing the resultant manganese dioxide with a lithium compound, firing. SOLUTION: Manganese dioxide obtained by electrolytical deposition is neutralized by potassium hydroxide or potassium carbonate to control the pH of the manganese dioxide to be not less than 2. Spinel type lithium manganate is obtained by miving the electrolytic manganese dioxide and a lithium raw material such as lithium carbonate, lithium nitrate, lithium hydroxide or the like and then firing, Before mixing or after mixing, the electrolytic manganese dioxide and the lithium raw material are pulverized so as to make the particle sizes about 5 to 30 μm, in order to obtain a larger reaction area. The preferable temp. of firing is not less than 750 deg.C. An anode material for non-aqueous electrolyte secondary battery is produced by using the spinel-type manganese dioxide thus obtained. |
