Invention Grant
- Patent Title: Anode having double-protection layer formed thereon for lithium secondary battery, and lithium secondary battery comprising same
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Application No.: US15780983Application Date: 2017-09-29
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Publication No.: US10897040B2Publication Date: 2021-01-19
- Inventor: Heewon Choi , Sangwook Woo , Ohbyong Chae , Eun Kyung Kim
- Applicant: LG CHEM, LTD.
- Applicant Address: KR Seoul
- Assignee: LG CHEM, LTD.
- Current Assignee: LG CHEM, LTD.
- Current Assignee Address: KR Seoul
- Agency: Birch, Stewart, Kolasch & Birch, LLP
- Priority: KR10-2016-0127015 20160930,KR10-2017-0126709 20170929
- International Application: PCT/KR2017/010924 WO 20170929
- International Announcement: WO2018/062934 WO 20180405
- Main IPC: H01M4/134
- IPC: H01M4/134 ; H01M4/38 ; H01M10/0525 ; H01M4/62 ; H01M10/42 ; H01M4/36 ; H01M4/02

Abstract:
The present invention relates to a negative electrode for a lithium secondary battery having a double protective layer formed therein, and in particular, to a negative electrode for a lithium secondary battery having a polymer protective layer and a carbon-based protective layer formed therein, and a lithium secondary battery including the same. The lithium secondary battery including the negative electrode according to the present invention is capable of enhancing battery performance and exhibiting stable performance by forming a stable lithium fluoride (LiF) layer and thereby preventing a loss of a solid electrolyte interface (SEI) layer. In addition, a cycle life property is enhanced during charge and discharge by absorbing dead lithium or lithium dendrite and thereby preventing an internal short circuit of the battery.
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