| 摘要 |
PURPOSE:To provide a secondary battery having excellent safety and charging/ discharging cyclic characteristic by forming a sheet of a neg. electrode material which can occlude and release Li electrochemically, and coating this sheet with carbon containing either of Ni, stainless steel, and Cu as metal powder. CONSTITUTION:A neg. electrode material 1 as a fusible alloy, for example Al, is shaped into a sheet, which is coated with carbon 2 containing either of Ni, stainless steel, and Cu as metal powder. Even though this fusible alloy, Al, makes repetition of expansion and contraction associated with charging/ discharging to cause change in the shape, slipping-off from the core 3 is prevented and electricity collection held practicable by shaping them into sheet form and coating with carbon 2 containing metal powder. This prevents drop of the charging/discharging capacity with cycles and also generation of internal shortcircuiting and firing. |
