Battery
AssigneeSony Corporation
InventorsShinya Wakita, Izaya Okae
Life of this patent
Estimating the term…
Abstract
A battery including a positive electrode, a negative electrode and an electrolytic solution, 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 which is obtained by copolymerizing 100 parts by weight of polyvinylidene fluoride (PVDF) and from 0 to 4 parts by weight of hexafluoropropylene (HFP) and a copolymer B which is obtained by copolymerizing 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.
Claims13
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.
A battery comprising:
- a positive electrode;
- a negative electrode;
- and
- a liquid electrolyte, 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.
Dependencies are inferred from the claim text.