| 摘要 |
PURPOSE:To decrease internal short of a battery by consisting of a positive electrode, electrolyte containing alkali metal ion, and a negative electrode containing metal alloy which stores and releases alkali metal ion and wrapped with a bag-shaped separator. CONSTITUTION:An alloy electrode plate having an expanded metal 5 as a core in an alloy 6 is prepared in such a way that a binary alloy comprising 85wt% Sn and 15wt% Cd is melted in a container and a nickel expanded metal which serves as a current collector is immersed in the melted alloy and taken out and cooled, and rolled in uniform thickness with a roller. A lithium sheet having about double thickness compared with that of the alloy plate is pressed on the alloy plate to prepare an alloy electrode 9. The electrode is wrapped with a bag-shaped separator 11 comprising polypropylene and sealed to form an electrode plate group of a nonaqueous electrolyte secondary battery. Eeven if the plate group expands by storing of lithium, internal short is prevented, and reliability is improved. |
