Acta Chimica Sinica ›› 2007, Vol. 65 ›› Issue (2): 165-169. Previous Articles     Next Articles

Original Articles

锂离子电池薄膜锡负极材料的制备及容量衰减机理研究

樊小勇1, 庄全超1, 许金梅1, 江宏宏1, 黄令1, 董全峰1,2, 孙世刚*,1   

  1. (1固体表面物理化学国家重点实验室 厦门大学化学化工学院化学系 厦门 361005)
    (2厦门大学宝龙电池研究所 厦门 361005)
  • 投稿日期:2005-12-28 修回日期:2006-04-20 发布日期:2007-01-28
  • 通讯作者: 孙世刚

Preparation and Capacity Fading Mechanism of Tin Thin Film as Anode of Lithium-ion Battery

FAN Xiao-Yong1; ZHUANG Quan-Chao1; XU Jin-Mei1; JIANG Hong-Hong1; HUANG Ling1; DONG Quan-Feng1,2; SUN Shi-Gang*,1   

  1. (1 State Key Lab for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005)
    (2 Xiamen University-Powerlong Battery Research Institute, Xiamen 361005)
  • Received:2005-12-28 Revised:2006-04-20 Published:2007-01-28
  • Contact: SUN Shi-Gang

Tin thin film coated on Cu substrate as anode of lithium-ion battery was prepared by electroplating. Its structure and properties were characterized and studied by X-ray diffration, scanning electron microscopy, cyclic voltammetry, charging/discharging test and AC impedence method. XRD patterns indicate that the tin thin film exhibits a structure of tetragonal crystal. The first discharge and charge capacities of the tin thin film electrode were determined to be 709 and 561 mAh•g-1, respectively. Cyclic voltammetric results illustrated that multi-phase changes occurred during the lithiation and delithiation. Elec-trochemical impedance spectroscopy (EIS) results indicated that SEI film was begun to form on the surface of tin thin film electrode at 1.2 V, and then break down below 0.4 V because of large volume expansion. SEM investigations revealed that the tin thin film electrode appeared serious cracks after 30 charging and discharging cycles.

Key words: lithium-ion battery, anode material, tin thin film, electroplating