Title:
POSITIVE ELECTRODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY CELL, AND NON-AQUEOUS ELECTROLYTE SECONDARY CELL
Document Type and Number:
WIPO Patent Application WO/2024/004720
Kind Code:
A1
Abstract:
Provided is a positive electrode active material in which an increase in resistance is suppressed, while the charge/discharge cycle characteristics of a non-aqueous electrolyte secondary battery are improved. The positive electrode active material that is included in the non-aqueous electrolyte secondary battery includes a lithium transition metal composite oxide, said lithium transition metal composite oxide containing Ni, Ca, and Sr, and including secondary particles that are formed by flocculation of primary particles. In an element concentration distribution of a cross-section of the lithium transition metal composite oxide that is obtained using time-of-flight secondary ion mass spectrometry, the Gini coefficient of Ca and Sr on the secondary particle surface is 0.7 or less, and the Gini coefficient of Ca and Sr in the secondary particle interior is 0.6 or less.
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Inventors:
TOGO MASAKAZU
INOUE KATSUYA
OGASAWARA TAKESHI
INOUE KATSUYA
OGASAWARA TAKESHI
Application Number:
PCT/JP2023/022465
Publication Date:
January 04, 2024
Filing Date:
June 16, 2023
Export Citation:
Assignee:
PANASONIC IP MAN CO LTD (JP)
International Classes:
H01M4/525; C01G53/00; H01M4/505
Domestic Patent References:
| WO2021106324A1 | 2021-06-03 | |||
| WO2022092182A1 | 2022-05-05 |
Foreign References:
| JPH11310416A | 1999-11-09 | |||
| JP2015503181A | 2015-01-29 |
Attorney, Agent or Firm:
YKI INTELLECTUAL PROPERTY ATTORNEYS (JP)
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