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US 8,298,708 B2Granted
Lithium secondary battery
AssigneeSanyo Electric Co., Ltd.
InventorsHiroshi Minami, Naoki Imachi
Life of this patent
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Abstract
A negative electrode mixture layer containing CMC and a hydroxy group-modified PVP. The mass ratio of CMC is greater than that of the hydroxy group-modified PVP. The hydroxy group-modified PVP has low affinity with a solvent for a solvent-system slurry that forms an inorganic particle layer. Adhesion strength is prevented from degrading after forming the inorganic particle layer on the negative electrode mixture layer.
Claims6
A lithium secondary battery comprising:
- a non-aqueous electrolyte;
- a positive electrode;
- and a negative electrode having a negative electrode mixture layer and an inorganic particle layer formed on the negative electrode mixture layer,
- the negative electrode mixture layer containing carboxymethylcellulose and a hydroxy group-modified polyvinyl pyrrolidone, and
- the mass ratio of the carboxymethylcellulose being greater than that of the hydroxy group-modified polyvinyl pyrrolidone.
2 more elements
Dependencies are inferred from the claim text.