Invention Grant
- Patent Title: Negative electrode active material for lithium secondary battery and lithium secondary battery comprising the same
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Application No.: US16756365Application Date: 2018-10-26
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Publication No.: US12034148B2Publication Date: 2024-07-09
- Inventor: Su Min Lee , Yong Ju Lee , Eun Kyung Kim , Rae Hwan Jo , Dong Hyuk Kim , Se Mi Park
- Applicant: LG CHEM, LTD.
- Applicant Address: KR Seoul
- Assignee: LG ENERGY SOLUTION, LTD.
- Current Assignee: LG ENERGY SOLUTION, LTD.
- Current Assignee Address: KR Seoul
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: KR 20170140766 2017.10.27
- International Application: PCT/KR2018/012853 2018.10.26
- International Announcement: WO2019/083330A 2019.05.02
- Date entered country: 2020-04-15
- Main IPC: H01M4/36
- IPC: H01M4/36 ; H01M4/02 ; H01M4/38 ; H01M4/48 ; H01M4/587 ; H01M10/0525

Abstract:
A negative electrode active material for a lithium secondary battery, the negative electrode active material including, based on 100 parts by weight of the total negative electrode active material, 5 parts by weight to 20 parts by weight of a first carbon-based particle, 55 parts by weight to 90 parts by weight of a second carbon-based particle, and 1 part by weight to 40 parts by weight of a silicon-based particle, wherein the specific surface area of the first carbon-based particle is 1.5 m2/g to 4.5 m2/g, the specific surface area of the second carbon-based particle is 0.4 m2/g to 1.5 m2/g, and the specific surface area of the first carbon-based particle is greater than the specific surface area of the second carbon-based particle, and capable of solving the problem of lifespan deterioration which may be caused by the use of a silicon-based particle as a negative electrode active material.
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