| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a battery capable of obtaining high energy density, and excellent cycle characteristics. <P>SOLUTION: In an anode 22, a thickness of one side of an anode active substance layer 22B containing a carbon material as an anode active substance is to be 70 μm or larger and 120 μm or smaller. Further, a binder containing two kinds of copolymers A and B in which polyvinylidene fluorides (PVDF) are copolymerized with hexafluoropropylene (HFP) at a specific copolymerization ratio in a specific mass abundance ratio is used as a binder for the anode 22, so that the energy density of the anode 22 is improved, and the diffusion and an acceptance property of the lithium ion in the anode 22 are improved. <P>COPYRIGHT: (C)2009,JPO&INPIT |
