| 摘要 |
PURPOSE:To constitute an nonaqueous lithium secondary battery having a large cycle discharge capacity by using, as a positive electrode, LiMn2O4 consisting of needle particles having corresponding diameters in which the short axis diameter, long axis diameter and height are specified. CONSTITUTION:LiMn2O4 consisting of needle particles having corresponding diameters of a short axis diameter not more than 5mum, a long axis diameter not more than 10mum, and a height not more than 5mum is mixed in a mortar, and the temperature is raised to bake it under air atmosphere. The obtained LiMn2O4, carbon powder of a conductive material, and polytetrafluoroethylene powder of a binder are mixed together, molded into a pellet, and used as a positive electrode. As a negative elellctrode 5, a lithium piece is used, and an electrolyte obtained by dissolving lithium perchlorate into a mixture of propylene carbonate and 1, 2-dimethoxyethane is impregnated in a separator 4 and used. Thus, a nonaqueous lithium secondary battery having a high cycle discharge capacity can be constituted. |
