METHOD FOR PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL

Title:

METHOD FOR PRODUCING POSITIVE ELECTRODE ACTIVE MATERIAL

Document Type and Number:

WIPO Patent Application WO/2024/003664

Kind Code:

A1

Abstract:

Provided is a positive electrode active material with a suppressed decrease in discharge capacity in a charge-discharge cycle. Alternatively, provided is a highly safe secondary battery. The secondary battery comprises a positive electrode having the positive electrode active material, a negative electrode, and an electrolyte. The positive electrode active material is produced by mixing a first composite oxide containing lithium and cobalt, a magnesium source, and a fluoride to form a mixture, heating the mixture at a temperature of 650-1130℃ to form a second composite oxide, and then cooling the second composite oxide at a cooling rate higher than 250℃/h.

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Inventors:

OCHIAI TERUAKI (JP)
MOMMA YOHEI (JP)
SUZUKI KUNIHIKO (JP)
YAMAZAKI SHUNPEI (JP)

Application Number:

PCT/IB2023/056246

Publication Date:

January 04, 2024

Filing Date:

June 16, 2023

Export Citation:

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Assignee:

SEMICONDUCTOR ENERGY LAB (JP)

International Classes:

H01M4/525; C01G51/00; C01G53/00; H01M4/36

Domestic Patent References:

WO2021109676A1	2021-06-10
WO2014051148A1	2014-04-03

Foreign References:

JP2021157925A	2021-10-07
JP2012038724A	2012-02-23

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