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Title:
POSITIVE ELECTRODE ACTIVE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/047974
Kind Code:
A1
Abstract:
Provided is a positive electrode active material for a lithium ion secondary battery which combines high capacity with favorable charging/discharging cycle characteristics.　In this positive electrode active material for a lithium ion secondary battery, the average value of the particle diameters of the primary particles evaluated with a scanning electron microscope is 50-550 nm, and the R value is greater than 0.420 but less than or equal to 0.460, the R value being calculated by formula (2) as follows: (2) R value = (I006+I102/I101 on the basis of the intensity I006 calculated from the height of a peak identified as the 006-plane of an α-NaFeO2 type layered structure in X-ray powder diffraction measurement, the intensity I102 calculated from the height of a peak identified as the 102-plane, and the intensity I101 calculated from the height of a peak identified as the 101-plane.

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Inventors:
NAKABAYASHI TAKASHI (JP)
TAKANO SHUICHI (JP)
TOKORO HISATO (JP)
Application Number:
PCT/JP2022/033802
Publication Date:
March 30, 2023
Filing Date:
September 08, 2022
Export Citation:
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Assignee:
PROTERIAL LTD (JP)
International Classes:
H01M4/525; C01G53/00; H01M4/505
Domestic Patent References:
WO2017061633A12017-04-13
WO2015182665A12015-12-03
Foreign References:
JP2002042817A2002-02-08
CN111435743A2020-07-21
KR101826612B12018-02-07
JP2000072446A2000-03-07
JP2002124257A2002-04-26
Other References:
JAURNAL OF MATERIALS CHEMISTRY A, pages 874 - 901
APPLIED SCIENCES, pages 8988
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