Invention Grant
- Patent Title: Copper foil for current collector of lithium secondary battery with improved wrinkle characteristics
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Application No.: US13722585Application Date: 2012-12-20
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Publication No.: US09457541B2Publication Date: 2016-10-04
- Inventor: Dae-Young Kim , Byoung-Kwang Lee , Seung-Jun Choi
- Applicant: LS Mtron Ltd.
- Applicant Address: KR Anyang, Gyeonggi-Do
- Assignee: LS MTRON LTD.
- Current Assignee: LS MTRON LTD.
- Current Assignee Address: KR Anyang, Gyeonggi-Do
- Agency: LRK Patent Law Firm
- Priority: JP2010-161088 20100715
- Main IPC: H01M4/64
- IPC: H01M4/64 ; B32B15/01 ; C22C9/00 ; C25D7/06 ; H01M4/66 ; C25D3/38 ; H01M10/052

Abstract:
A copper foil for a current collector of a lithium secondary battery has a crystalline structure, in which a ratio of the sum of texture coefficients of a (111) surface and a (200) surface to the total sum of texture coefficients of the (111), (200) and (220) surfaces is 60 to 85%, a ratio of the texture coefficient of the (111) surface to the total sum of texture coefficients of the (111), (200) and (220) is 18 to 38%, a ratio of the texture coefficient of the (200) surface thereto is 28 to 62%, and a ratio of the texture coefficient of the (220) surface thereto is 15 to 40%. The copper foil has surface roughness (Rz-JIS) of 2 μm or less, weight deviation of 3% or less, tensile strength of 30 to 40 kgf/mm2, elongation of 3 to 20%, and thickness of 1 to 35 μm.
Public/Granted literature
- US20130108887A1 COPPER FOIL FOR CURRENT COLLECTOR OF LITHIUM SECONDARY BATTERY WITH IMPROVED WRINKLE CHARACTERISTICS Public/Granted day:2013-05-02
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