| 摘要 |
PURPOSE:To prevent the defective insertion of a separator without increasing internal resistance by forming specific ion permeating thin films on both faces of the separator. CONSTITUTION:An ion permeating polymer material selected among polyacryl amide, soda polyacrylate, polyethylene, and polypropylene is coated on both faces of a separator 5 to form ion permeating thin films 12, i.e., microporous thin films 12 are formed on the surfaces of the separator 5. An internal short circuit due to irregularities of the contact face of the positive electrode black mix 6 or the infiltration of the fine powder of the positive electrode black mix 6 liberated during assembling into the separator surface and the local discharge reaction caused by the partial nonuniformity of the inter-electrode distance due to the dispersion of the thickness of the positive electrode black mix 6 can be suppressed. |
