| 摘要 |
PROBLEM TO BE SOLVED: To make improvement of a charge/discharge characteristic compatible with improvement of productivity, workability, in a nonaqueous electrolyte secondary cell. SOLUTION: A positive electrode 1 is formed in a constitution comprising an LiMn2 O4 particle (positive electrode active material) of 10 to 40μm grain size, 6 to 8wt.% graphite (conductive material) of grain size 1/5 to 1/10 the LiMn2 O4 particle and 3 to 5wt.% polyvinyliclene fluoride (binding agent). A positive electrode active material of relatively large grain size is thus used, so as to well hold productivity and workability, a conductive material of relatively small grain size is used on the other hand, so as to large ensure a contact area with the positive electrode active material. A negative electrode 2 may be any of a carbon material and metal Li, Li alloy, in the case of using the former one, an Li ion secondary cell is constituted, in the case of using the latter two, a metal Li secondary cell is constituted. |
