| 摘要 |
PURPOSE:To enhance durability in repeated charge-discharge in spite of small size using polyaniline as a positive active material, lithium alloy as a negative active material, and in addition, by limiting the effective amount of lithium polyaniline in a specified range. CONSTITUTION:In a lithium alloy used in a negative active materials of a secondary battery, the effective amount of lithium which participates in charge- discharge by electrochemically absorbing and desorbing ions is limited to 4X10<-3>-170X10<-3>mol, preferably to 4X10<-3>-130X10<-3>mol per 1g of polyaniline serving as a positive active material. If the effective amount of lithium is less than 4X10<-3>mol, charge current is increased with increase in the number of charge-discharge cycles, and discharge capacity is decreased, and polyaniline is dissolved. This secondary battery shows 1,000-2,000 charge-discharge cycles at a discharge capacity of 1mA, and is used for IC memory backup of personal computers. |
