POSITIVE ELECTRODE FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

WIPO Patent Application WO/2022/044935

A1

The purpose of the present disclosure is to provide a nonaqueous electrolyte secondary battery that has high capacity and excellent cycle characteristics. A nonaqueous electrolyte secondary battery according to one embodiment of the present invention is provided with a positive electrode, a negative electrode and a nonaqueous electrolyte. An electrode mixture layer of the positive electrode contains: first lithium metal composite oxide particles that are non-aggregated particles which have a volume-based median diameter of from 2 μm to 10 μm; and second lithium metal composite oxide particles that are secondary particles, in each of which primary particles having an average particle diameter of from 50 nm to 2 μm aggregate, and which have a volume-based median diameter of from 10 μm to 30 μm. If the positive electrode mixture layer is divided into equal halves in the thickness direction and the halves are defined as the first region and the second region sequentially from the surface side of the positive electrode mixture layer, the content of the first lithium metal composite oxide particles in the first region is higher than the content of the first lithium metal composite oxide particles in the second region.

SAKITANI NOBUHIRO
MORITA KOKI
NOMURA SHUN
FUJIMOTO HIROYUKI

PCT/JP2021/030301

March 03, 2022

August 19, 2021

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SANYO ELECTRIC CO (JP)

H01M4/131; H01M4/36

WO2018150843A1	2018-08-23
WO2021153397A1	2021-08-05

JP2013120736A	2013-06-17
JP2020053386A	2020-04-02

YKI INTELLECTUAL PROPERTY ATTORNEYS (JP)

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