Patent ID: 8574761

Claim:
A battery comprising: a positive electrode; a negative electrode; and an electrolytic solution containing an electrolyte salt and a solvent comprising at least one of propylene carbonate and vinylene carbonate, wherein the negative electrode has a negative electrode active material layer containing a carbon material and a binder and having a thickness per one face of 70 μm or more and not more than 120 μm; and the binder contains a copolymer A and a copolymer B, the copolymer A being a copolymer of 100 parts by weight of polyvinylidene fluoride (PVDF) and from 0 to 4 parts by weight of hexafluoropropylene (HFP), the copolymer B being a copolymer of 100 parts by weight of polyvinylidene fluoride and from 5 to 12 parts by weight of hexafluoropropylene, in a mass content ratio of A/B of from 60/40 to 90/10.