| 摘要 |
PROBLEM TO BE SOLVED: To provide a battery having stable performance by increasing an initial capacity, reducing a capacity decrease and decreasing chipping and crack ing in an electrode surface fixing an active material. SOLUTION: A polyvinylidene fluoride system polymer (for instance, polyvinylidene fluoride) and a rubber polymer (for instance, polymer obtained as a latex particle by copolymerizing 40 pts.wt. stylene, 30 pts.wt. butadiene, 20 pts.wt. meacrylic acid methyl, 5 pts.wt. acrylonitrile, 5 pts.wt. itaconic acid) are fused or dispersed in a polarity organic solvent (for instance, N-methyl pyroliclone), a battery binder composition is formed, active material (for instance, LiCo2 of positive electrode active material, carbon of negative electrode active material) is compounded therein, obtained slurry is applied to an electrode base unit, the solvent is removed, an electrode is formed, so as to manufacture a battery. |
