Rolled electrodeposited copper foil with modified surface morphology as anode current collector for high performance lithium-ion batteries

被引:32
作者
Chen, Jingqi [1 ,2 ]
Wang, Xiaogong [3 ]
Gao, Haitao [1 ]
Yan, Shu [4 ]
Chen, Shoudong [5 ]
Liu, Xianghua [1 ,2 ]
Hu, Xianlei [1 ,6 ]
机构
[1] Northeastern Univ, State Key Lab Rolling & Automat, Shenyang 110819, Peoples R China
[2] Key Lab Lightweight Struct Mat, Shenyang 110819, Liaoning, Peoples R China
[3] North China Univ Sci & Technol, Coll Met & Energy, Tangshan 063210, Peoples R China
[4] Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China
[5] Tongling Univ, Sch Mech Engn, Tongling 244061, Peoples R China
[6] Suzhou Dongbaohaixing Met Mat Sci & Technol Co Lt, Suzhou 215000, Peoples R China
基金
中国国家自然科学基金;
关键词
Rolled electrodeposited copper foil; Surface morphology modification; Mechanical properties; Electrochemical performances; Lithium-ion battery; ELECTROCHEMICAL PERFORMANCE; COMPOSITE;
D O I
10.1016/j.surfcoat.2021.126881
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A novel method that taking electrodeposited copper foil as a raw material undergoes asynchronous rolling and surface morphology modification at room temperature was proposed, and the rolled electrodeposited (RE) copper foil with excellent mechanical properties and modified surface morphology was obtained to be used as the anode current collector of high-performance lithium-ion batteries. The surface roughness of RE copper foil (Ra = 1.8 mu m) is significantly higher than that of the traditional electrodeposited copper foil (Ra = 0.22 mu m) when the thickness is 6 mu m. The hilly surface morphology of RE copper foil helps to enhance the interfacial adhesion between current collector and active material, which contributes to the reduction of charge transfer resistance and improvement of specific capacity and rate performance. The mechanical properties of RE copper foil are significantly improved after asynchronous rolling. The excellent mechanical properties of RE copper foil current collector can maintain good electrical contact integrity of electrode active material during lithiation-de-lithiation and significantly improve the cycle life. The discharge capacity of RE electrode is maintained at 329.6 mAh g(-1) and exhibits 91.1% capacity retention for 200 cycles at 500 mAg(-1), which is much higher than the electrodes with electrodeposited and rolled copper foils as the current collector.
引用
收藏
页数:9
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