- 专利标题： METHOD FOR MANUFACTURING LITHIUM SECONDARY BATTERY, AND LITHIUM SECONDARY BATTERY MANUFACTURED THEREBY
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申请号： EP21898364.1申请日： 2021-10-22
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公开(公告)号： EP4203098A1公开(公告)日： 2023-06-28
- 发明人: BAEK, So Ra , KIM, Hak Yoon , HUR, Hyuck , KIM, Dong Hwi , KIM, Hyeong Il , CHAE, Seul Ki , JUNG, Wang Mo , LEE, Dong Hun
- 申请人： LG Energy Solution, Ltd.
- 申请人地址： KR Seoul 07335 Tower 1, 108, Yeoui-daero Yeongdeungpo-gu
- 代理机构： Hoffmann Eitle
- 优先权： KR20200162322 20201127
- 国际公布： WO2022114538 20220602
- 主分类号： H01M4/1391
- IPC分类号： H01M4/1391 ; H01M4/36 ; H01M4/62 ; H01M4/525 ; H01M4/505 ; H01M10/052 ; H01M4/38 ; H01M4/48
摘要：
The present invention relates to a method of preparing a lithium secondary battery which includes steps (1) to (5) below.
(1) preparing a first positive electrode active material by mixing a small particle lithium composite transition metal oxide having an average particle diameter (D 50 ) of less than 7 um with a boron-containing raw material and performing a heat treatment;
(2) preparing a second positive electrode active material by mixing a large particle lithium composite transition metal oxide having an average particle diameter (D 50 ) of 8 um or more with a cobalt-containing raw material and a boron-containing raw material and performing a heat treatment;
(3) mixing the first positive electrode active material and the second positive electrode active material to prepare a positive electrode material having a bimodal particle diameter distribution;
(4) preparing a positive electrode by coating the positive electrode material on a positive electrode collector; and
(5) assembling the positive electrode, a negative electrodeincluding a silicon-based negative electrode active material, and a separator
(1) preparing a first positive electrode active material by mixing a small particle lithium composite transition metal oxide having an average particle diameter (D 50 ) of less than 7 um with a boron-containing raw material and performing a heat treatment;
(2) preparing a second positive electrode active material by mixing a large particle lithium composite transition metal oxide having an average particle diameter (D 50 ) of 8 um or more with a cobalt-containing raw material and a boron-containing raw material and performing a heat treatment;
(3) mixing the first positive electrode active material and the second positive electrode active material to prepare a positive electrode material having a bimodal particle diameter distribution;
(4) preparing a positive electrode by coating the positive electrode material on a positive electrode collector; and
(5) assembling the positive electrode, a negative electrodeincluding a silicon-based negative electrode active material, and a separator
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