Title:
POSITIVE ELECTRODE ACTIVE MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, AND NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2024/004687
Kind Code:
A1
Abstract:
Provided is a positive electrode active material that has improved charge/discharge cycle characteristics at a high capacity of a non-aqueous electrolyte secondary battery. 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 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 Sr on the secondary particle surface is 0.85 or less, the Gini coefficient of Sr in the secondary particle interior is 0.7 or less, and the ratio ISr_OUT/ISr_IN of the standardized strength ISr_OUT of the Sr on the secondary particle surface to the standardized strength ISr_IN of the Sr in the secondary particle interior is 1–5 inclusive.
Inventors:
TOGO MASAKAZU
INOUE KATSUYA
OGASAWARA TAKESHI
INOUE KATSUYA
OGASAWARA TAKESHI
Application Number:
PCT/JP2023/022280
Publication Date:
January 04, 2024
Filing Date:
June 15, 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 |
Attorney, Agent or Firm:
YKI INTELLECTUAL PROPERTY ATTORNEYS (JP)
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