POSITIVE ELECTRODE ACTIVE MATERIAL, SECONDARY BATTERY, ELECTRONIC DEVICE, AND VEHICLE

Title:

POSITIVE ELECTRODE ACTIVE MATERIAL, SECONDARY BATTERY, ELECTRONIC DEVICE, AND VEHICLE

Document Type and Number:

WIPO Patent Application WO/2023/248044

Kind Code:

A1

Abstract:

Provided is a positive electrode active material that is prevented from the decrease in a discharge capacity in a charge-discharge cycle. This positive electrode active material comprises cobalt, nickel and oxygen, in which the content of nickel relative to the total amount of cobalt and nickel, i.e., Ni/(Co+Ni), is more than 0.175 and equal to or less than 0.215, and the positive electrode active material has diffraction peaks at least two of 2θ = 18.526±0.1°, 2θ = 37.391±0.1°, 2θ = 37.628±0.1°, 2θ = 39.015±0.1°, 2θ = 44.947±0.1°, 2θ = 49.029±0.1° and 2θ = 58.857±0.1° when the positive electrode active material is analyzed by powder X-ray diffraction using CuKα1 line in the state charged to 4.5 V (vs.Li/Li+).

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Inventors:

MIKAMI MAYUMI (JP)
SAITO JO (JP)
TANEMURA KAZUKI (JP)
YAMAZAKI SHUNPEI (JP)

Application Number:

PCT/IB2023/055955

Publication Date:

December 28, 2023

Filing Date:

June 09, 2023

Export Citation:

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Assignee:

SEMICONDUCTOR ENERGY LAB (JP)

International Classes:

H01M4/525; C01G53/00; H01M4/36

Foreign References:

JP2014220261A	2014-11-20
CN111613782A	2020-09-01
JP2021007100A	2021-01-21

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