Invention Grant
- Patent Title: Composite negative electrode material for secondary battery, and negative electrode and lithium secondary battery including the same
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Application No.: US15746322Application Date: 2017-05-19
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Publication No.: US11552289B2Publication Date: 2023-01-10
- Inventor: Su Min Lee , Sun Young Shin , Eun Kyung Kim , Su Yeon Lee , Lilin Piao
- Applicant: LG Chem, Ltd.
- Applicant Address: KR Seoul
- Assignee: LG Chem, Ltd.
- Current Assignee: LG Chem, Ltd.
- Current Assignee Address: KR Seoul
- Agency: Lerner, David, Littenberg, Krumholz & Mentlik, LLP
- Priority: KR10-2016-0061365 20160519,KR10-2017-0061875 20170518
- International Application: PCT/KR2017/005226 WO 20170519
- International Announcement: WO2017/200338 WO 20171123
- Main IPC: H01M4/36
- IPC: H01M4/36 ; H01M4/133 ; H01M4/587 ; H01M4/62 ; H01M10/0525 ; H01M4/1393 ; H01M4/02
Abstract:
The present invention relates to a composite negative electrode material for a secondary battery, and a negative electrode and a lithium secondary battery which include the same, and particularly to a composite negative electrode material for a secondary battery, which includes a graphene sheet, and two or more coating layers formed on both sides of the graphene sheet, wherein the two or more coating layers include at least one polymer coating layer and at least one pitch coating layer, and the graphene sheet and the two or more coating layers are included in a weight ratio of greater than 1:greater than 0.01 to less than 0.1, and a negative electrode and a lithium secondary battery which include the same.
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