Patent ID: 11870035
Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  C  Y | IPC C  H

Claim 0:
1. A non-aqueous electrolyte secondary battery, comprising:
a positive electrode;
a negative electrode; and
a non-aqueous electrolyte, wherein
the positive electrode has a positive electrode active material including complex oxide particles, including Ni, Co and Li and including at least Mn, wherein a ratio of Ni to a total number of moles of metallic elements except Li is 80 mol % or more,
the complex oxide particles exist in a state of at least one of: completely separated individual primary particles and about 2 to 15 primary particles in the positive electrode active material,
the complex oxide particles have a ratio of a BET specific surface area after a particle compression test (B) to a BET specific surface area before the particle compression test (A) (B/A) of 1.918 or more and 3.0 or less, and
the non-aqueous electrolyte includes a cyclic carboxylic anhydride represented by the following formula (1) and a non-aqueous solvent:, , wherein R1 to R4 each independently represent H, an alkyl group, an alkene group or an aryl group.