Invention Grant
- Patent Title: Negative electrode active material having double coating layer, method for preparing the same and lithium secondary battery including the same
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Application No.: US15034666Application Date: 2015-08-26
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Publication No.: US10581069B2Publication Date: 2020-03-03
- Inventor: Hyun Wook Kim , Eun Kyung Kim , Sang Wook Woo
- Applicant: LG Chem, Ltd.
- Applicant Address: KR
- Assignee: LG Chem, Ltd.
- Current Assignee: LG Chem, Ltd.
- Current Assignee Address: KR
- Agency: Lerner, David, Littenberg, Krumholz & Mentlik, LLP
- Priority: KR10-2014-0111502 20140826
- International Application: PCT/KR2015/008945 WO 20150826
- International Announcement: WO2016/032240 WO 20160303
- Main IPC: H01M4/13
- IPC: H01M4/13 ; H01M4/60 ; H01M4/58 ; H01M4/82 ; H01M6/00 ; H01M4/36 ; H01M4/587 ; H01M4/1393 ; C01B32/05 ; H01M4/62 ; H01M10/0525 ; H01M4/02

Abstract:
The present invention relates to a negative electrode active material having a double coating layer of a first coating layer and a second coating layer, which has an excellent output property, effectively suppresses a side reaction with an electrolyte liquid, particularly a PC-containing electrolyte liquid, and has excellent electric conductivity, a method for manufacturing the same, a negative electrode including the same, and a lithium secondary battery including the negative electrode. The negative electrode active material according to the present invention is capable of effectively preventing a side reaction with an electrolyte liquid, particularly a PC-containing electrolyte liquid, and is capable of improving electric conductivity, and as a result, enhancing a rate determining property by reducing an OCV drop of a lithium secondary battery including the negative electrode active material, and enhancing a high rate property.
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