发明名称 |
LITHIUM-ION SECONDARY BATTERY, ELECTRODE FOR SECONDARY BATTERY, AND ELECTROLYTIC COPPER FOIL FOR SECONDARY BATTERY ELECTRODE |
摘要 |
To provide an electrolytic copper foil for a negative electrode for a lithium-ion secondary battery with which it is possible to produce a long-life lithium-ion secondary battery in which there is no decline in the capacity retention ratio even when the charge-discharge cycling is repeated, that has long life, and no deformation of a negative electrode current collector occurs. The electrolytic copper foil constituting the negative electrode current collector for the lithium-ion secondary battery has, after heat treatment at from 200 to 400°C, a 0.2% proof stress of 250N/mm 2 or more, and elongation of 2.5% or more; and the surface on which an active material layer of the electrolytic copper foil is provided has been rust-proofed, or roughened and rust-proofed. As a result of analysis of the depth profile (depth direction) obtained by performing secondary ion mass spectrometry (SIMS) in the thickness direction of the copper foil, the copper foil including: chlorine (Cl), carbon (C), and oxygen (O) each in a concentration of 10 17 to 5×10 20 atoms/cm 3 , and sulfur (S) and nitrogen (N) each in a concentration of 10 15 to 10 19 atoms/cm 3 . |
申请公布号 |
EP2654111(A4) |
申请公布日期 |
2014.08.13 |
申请号 |
EP20110853729 |
申请日期 |
2011.12.27 |
申请人 |
FURUKAWA ELECTRIC CO., LTD. |
发明人 |
SUZUKI, AKITOSHI;SHINOZAKI, KENSAKU;TANI, TOSHIO;SASAKI, HIROKAZU;FUTABA, ISAMU;HATAYA, KOUJI;OHTOMO, SHINYA;YOSHIKAWA, HIROKAZU |
分类号 |
H01M4/66;C22F1/08;C23C22/24;C25D1/04;C25D3/38;C25D5/10;C25D5/16;C25D5/48;C25D7/06;H01M4/04;H01M4/13;H01M4/133;H01M4/134;H01M4/1393;H01M4/1395;H01M10/0525;H05K1/09 |
主分类号 |
H01M4/66 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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