Nanograined copper foil as a high-performance collector for lithium-ion batteries

被引：0

作者：

School of Materials Science and Engineering, Department of Energy and Environmental Materials, Jiangxi Key Laboratory of Power Batteries and Materials, Jiangxi University of Sciences and Technology, Ganzhou ^{[1
]}

341000, China

机构：

来源：

J Alloys Compd | 2020年

基金：

中国国家自然科学基金;

关键词：

Metal cladding - Copper corrosion - Graphite electrodes - Lithium-ion batteries - Ions;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

The surface of a coarse-grained (CG) copper (Cu) plate was treated using ultrasonic surface rolling processing (USRP) technology to obtain a special Cu foil with a nanograined (NG) surface and a grain size of approximately 70 nm. The obtained NG Cu foil had a rougher surface and a larger specific surface area than the original foil. As a result, the NG Cu foil displayed a higher bonding strength with graphite particles, stronger corrosion resistance to electrolytes and superior lithium storage performance than the pristine copper foil. The initial charging capacity of the NG Cu-graphite electrode (340 mAh g−1) was much higher than that of the CG Cu-graphite electrode. After 100 cycles, the capacity remained at 300 mAh g−1, corresponding to a capacity retention of 88.2% for the NG Cu-graphite electrode. These values were also much higher than those of the CG Cu-graphite electrode (which exhibited a capacity of 200 mAh g−1 and a capacity retention of 86.9%). The USRP of the Cu foil surface considerably improved the capacity, cycling and rate performance of the Cu-graphite electrode for lithium-ion batteries. These novel results can be used to develop large-capacity and long-life electrode collector materials for lithium-ion batteries. © 2020 Elsevier B.V.

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