Patent ID: 11929485
Assignee: MURATA MANUFACTURING CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 0:
1. A secondary battery comprising:
a positive electrode including a positive electrode active material layer;
a negative electrode; and
an electrolyte,
wherein the positive electrode active material layer includes a positive electrode active material, a homopolymer of polyvinylidene difluoride having a melting point from 152° C. to 166° C., a conductive assistant having a specific surface area from 1000 m2/g to 1500 m2/g, and a vinylpyrrolidone-based polymer,
a content of the homopolymer of the polyvinylidene difluoride in the positive electrode active material layer is 0.7 mass % or more and 4.0 mass % or less,
a content of the conductive assistant in the positive electrode active material layer is 0.2 mass % or more and 5 mass % or less, and
a content of the vinylpyrrolidone-based polymer in the positive electrode active material layer is from 0.01 mass % to 0.2 mass %.