发明公开
- 专利标题： POSITIVE ACTIVE MATERIAL, PREPARING METHOD THEREOF AND RECHARGEABLE LITHIUM BATTERY
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申请号： EP22796086.1申请日： 2022-04-26
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公开(公告)号： EP4333122A1公开(公告)日： 2024-03-06
- 发明人: PARK, Inchul , KIM, Hyungsub , LEE, Sanghyuk , SONG, Jung Hoon , KIM, Junghoon , CHOI, Kwon Young , KWON, Ohmin , NAM, Sang Cheol , SONG, Seok Hyun
- 申请人： POSCO Holdings Inc. , RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY , POSCO Chemical Co., Ltd
- 申请人地址： KR Seoul 06194 440, Teheran-ro Gangnam-gu; KR Pohang-si, Gyeongsangbuk-do 37673 67 Cheongam-ro, Nam-gu,; KR Gyeongsangbuk-do 37918 (Cheongnim-dong) 110, Sinhang-ro Nam-gu Pohang-si
- 代理机构： Potter Clarkson
- 优先权： KR20210055862 20210429
- 国际公布： WO2022231253 20221103
- 主分类号： H01M4/525
- IPC分类号： H01M4/525 ; H01M4/505 ; H01M10/052 ; C01G53/00
摘要：
It is related to a positive active material for a lithium secondary battery, comprising:
a compound represented by the following formula 1,
wherein, a molar content of lithium present in a structure of the positive active material, measured through neutron diffraction analysis, is 1.02 to 1.15 per mole of the positive active material, and a c-axis lattice constant variation ratio of the R-3m structure is less than 2.3% for charge and discharge in the 2.5 V to 4.25 V range.
[Chemical Formula 1] Li 1+a (Ni b M 1 1-b ) 1-a O 2
in formula 1 above, 0
a compound represented by the following formula 1,
wherein, a molar content of lithium present in a structure of the positive active material, measured through neutron diffraction analysis, is 1.02 to 1.15 per mole of the positive active material, and a c-axis lattice constant variation ratio of the R-3m structure is less than 2.3% for charge and discharge in the 2.5 V to 4.25 V range.
[Chemical Formula 1] Li 1+a (Ni b M 1 1-b ) 1-a O 2
in formula 1 above, 0
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