| 摘要 |
PURPOSE:To restrain the capacity deterioration of a battery to the minimum, when stored, keep high energy density over a long period and greatly improve the cycle property. CONSTITUTION:Insulating resin polyethersulfone (PES) unsoluble in electrolyte in a battery container 3 is applied for coating to the exposure portion 11d of a negative electrode 11 which forms the outsidemost periphery during winding and has no contact with a positive electrode chemical portion 12c and the exposure portion 11e which forms the insidemost periphery and has no contact with the positive electrode chemical portion 12c. |
