| 摘要 |
PROBLEM TO BE SOLVED: To enhance the storage characteristics by adding additives such as Al2 O3 to manganese oxides, thereby deactivating the active portion of the manganese oxide, and making the reaction of the manganese oxide with non-aqueous electrolyte during storage be hardly caused. SOLUTION: In the process of fabricating a positive electrode, alumina (Al2 O3 ) is added to manganese dioxide which has undergone a dehydrating process, and the obtained mixture is mixed with carbon powder as electroconductive aid material and fluororesin powder as a binder, and the resultant material is pressure molded into a disc shape, followed by a heating process. In lieu of alumina, it may be accepted to add to manganese oxide at least one of the additives selected among In2 O2 , Tl2 O3 , LiAlO2 , LiGaO2 , and LiTlO2 . As a result, the active portion of the manganese oxide is deactivated so as to make the reaction of manganese oxide with a non-aqueous electrolyte during storage be hardly caused, and excellent storage characteristics can be established. |
