Preparation and characterization of three-dimensional tin thin-film anode with good cycle performance

被引:43
作者
Du, Zhijia [1 ]
Zhang, Shichao [1 ]
Jiang, Tao [1 ]
Bai, Zhiming [1 ]
机构
[1] Beihang Univ, Sch Mat Sci & Engn, Beijing 100191, Peoples R China
基金
中国国家自然科学基金;
关键词
Lithium-ion battery; Tin anode; Thin film; Three-dimension; Electroless plating; LITHIUM-ION BATTERIES; EXPANDED MESOCARBON MICROBEADS; ELECTROCHEMICAL PROPERTIES; SECONDARY BATTERIES; NEGATIVE ELECTRODES; NANOSIZED TIN; SN; SUBSTRATE; GRAPHITE; BEHAVIOR;
D O I
10.1016/j.electacta.2010.01.065
中图分类号
O646 [电化学、电解、磁化学];
学科分类号
081704 ;
摘要
Three-dimensional tin thin-film anode was prepared by electroless plating tin onto three-dimensional (3D) copper foam (which served as current collector), and characterized physically by SEM, EDS and XRD. Its electrochemical property and mechanism were studied by charge-discharge test, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The SEM and EDS results indicated that tin film with 500 nm thickness was formed over the whole surface of copper branches. The XRD results suggested that a new phase of Cu6Sn5 was formed between copper and tin. Besides the tin microflake structure of 500 nm thickness, the interaction effects of the copper foam and Cu6Sn5 phase formed between copper and tin resulted in good cycle performance with first discharge capacity of 737 mAh g(-1), 97% capacity retention after 20 cycles and still 84% after 40 cycles. (C) 2010 Elsevier Ltd. All rights reserved.
引用
收藏
页码:3537 / 3541
页数:5
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