Panasonic Intellectual Property Management Co., Ltd.

Yuanlong Zhong

Masaki Hasegawa

Tomoki Tsuji

A non-aqueous electrolyte secondary cell provided with a positive electrode, a negative electrode, and a non-aqueous electrolyte. The positive electrode has a positive electrode active material that contains composite oxide particles which include Ni, Co, Li, and at least one of Mn and Al, and in which the proportion of Ni in relation to the total number of moles of metal elements excluding Li is at least 80 mol %. In the composite oxide particles, the ratio (B/A) of the post-particle-compression-test BET specific surface area (B) with respect to the pre-particle-compression-test BET specific surface area (A) is 1.0-3.0. The non-aqueous electrolyte contains a non-aqueous solvent and a cyclic carboxylic anhydride such as diglycolic anhydride.

Non-aqueous electrolyte secondary cell

This nonaqueous electrolyte secondary battery is provided with a positive electrode, a negative electrode and a non-aqueous electrolyte. The non-aqueous electrolyte contains: a non-aqueous solvent that contains a fluorine-containing cyclic carbonate; an isocyanuric acid derivative such as triallyl isocyanurate; and a cyclic carboxylic acid anhydride such as diglycolic acid anhydride.

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Osaka, Japan

Yuanlong Zhong