| abstract |
(57) [Abstract] [PROBLEMS] To improve both charge / discharge characteristics and productivity / workability in a non-aqueous electrolyte secondary battery. A positive electrode is made of LiMn 2 having a particle size of 10 to 40 μm. O 4 particles (positive electrode active material) and graphite (conductive material) 6 having a particle size of 1/5 to 1/10 of the LiMn 2 O 4 particles -8% by weight, and polyvinylidene fluoride (binder) 3-5 The composition is composed of weight%. By using a positive electrode active material with a relatively large particle size in this way, good productivity and processability are maintained, while using a conductive material with a relatively small particle size ensures a large contact area with the positive electrode active material. To do. The negative electrode may be any of layered carbon material, metallic Li, and Li alloy, When the former one is used, a Li-ion secondary battery is formed, and when the latter one is used, a metallic Li secondary battery is formed. |