Title:
LITHIUM-METAL COMPOSITE OXIDE, POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM SECONDARY BATTERY, POSITIVE ELECTRODE FOR LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2022/265016
Kind Code:
A1
Abstract:
This lithium-metal composite oxide includes: secondary particles that are aggregates of primary particles; and isolated particles that exist separately from the secondary particles. The lithium metal composite oxide has a layered rock salt-type structure, is represented by composition formula (1), and satisfies requirements (1) and (2). (1): 1.2≤LA/LB<1.60 (LA is the crystallite diameter determined from the diffraction peak in the range of 2θ=18.8±1° in powder X-ray diffraction using CuKα rays and LB is the crystallite diameter determined from the diffraction peak in the range of 2θ=38.3±1°.) (2): The lithium site occupancy of Me in the layered rock salt-type structure as determined by Rietvelt analysis of the abovementioned diffraction peaks is 2.5%. Me is Ni, Co, Mn or X1.
Inventors:
TAKEMOTO MARIE (JP)
NAGAO DAISUKE (JP)
NAGAO DAISUKE (JP)
Application Number:
PCT/JP2022/023824
Publication Date:
December 22, 2022
Filing Date:
June 14, 2022
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO (JP)
International Classes:
H01M4/525; C01G53/00; H01M4/131; H01M4/36; H01M4/505
Domestic Patent References:
| WO2018043189A1 | 2018-03-08 |
Foreign References:
| JP2018107053A | 2018-07-05 | |||
| JP2019106241A | 2019-06-27 |
Attorney, Agent or Firm:
MATSUNUMA Yasushi et al. (JP)
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