| 摘要 |
PURPOSE:To provide a nonaqueous solvent electrolyte battery of an excellent discharge cycle life by assembling a nonaqueous solvent secondary battery comprising specific positive and negative electrodes, and then applying a pre- discharge process to it. CONSTITUTION:For a nonaqueous secondary battery including a positive electrode including lithium manganese compound formed of lithium nitrate and manganese dioxide, and a negative electrode comprising lithium and carbon material as carrier for it, after the battery is assembled, a pre-discharge process for 10-30% the capacity of the positive electrode is applied. For the lithium carrier to be used in the negative electrode, carbon material obtained by baking organic high polymer compound such as phenol resin, polyacrylonitrile, or cellulose; carbon material obtained by baking cokes or pitch; or carbon material such as artificial graphite or natural graphite can be listed. For the capacity of the pre-discharge process, storage characteristics in high temperatures are not improved when it is less than 10%, and when it exceeds 30%, the initial discharge capacity is decreased largely, which are not favorable. |
