物理化学学报 >> 2009, Vol. 25 >> Issue (04): 611-616.doi: 10.3866/PKU.WHXB20090403

研究论文 上一篇    下一篇

以多孔铜为集流体制备Cu6Sn5合金负极及其性能

樊小勇 庄全超 魏国祯 柯福生 黄令 董全峰 孙世刚   

  1. 长安大学材料科学与工程学院, 西安 710061; 厦门大学化学化工学院化学系, 固体表面物理化学国家重点实验室, 福建 厦门 361005
  • 收稿日期:2008-10-31 修回日期:2009-01-07 发布日期:2009-03-31
  • 通讯作者: 樊小勇 孙世刚 E-mail:fandajiao@yahoo.com.cn;sgsun@xmu.edu.cn

Fabrication and Performance of Cu6Sn5 Alloy Anode Using Porous Cu as Current Collector

FAN Xiao-Yong, ZHUANG Quan-Chao, WEI Guo-Zhen, KE Fu-Sheng, HUANG Ling, DONG Quan-Feng, SUN Shi-Gang   

  1. School of Materials Science and Engineering, Chang'an University, Xi'an 710061, P. R. China; 2State Key Laboratory for Physical Chemistry of Solid Surfaces, Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen 361005, Fujian Province, P. R. China
  • Received:2008-10-31 Revised:2009-01-07 Published:2009-03-31
  • Contact: FAN Xiao-Yong, SUN Shi-Gang E-mail:fandajiao@yahoo.com.cn;sgsun@xmu.edu.cn

摘要:

以氢气泡为动力学模板电沉积获得多孔铜, 并通过热处理增强其结构稳定性. 进一步将多孔铜作为基底通过电沉积制备Cu-Sn合金负极. XRD结果给出其组成为Cu6Sn5合金, 扫描电子显微镜(SEM)观察到Cu6Sn5合金电极为三维(3D)多孔结构. 充放电结果指出, Cu6Sn5合金电极具有较好的充放电性能, 其首次放电(嵌锂)和充电(脱锂)容量分别为735和571 mAh·g-1, 并且具有较好的容量保持率. 运用电化学阻抗谱研究了Cu6Sn5合金电极在商业电解液中的界面特性.

关键词: 多孔铜集流体, Cu6Sn5合金, 锂离子电池, 负极, 电化学阻抗谱

Abstract:

Porous Cu was fabricated by electrodeposition through a kinetic template of hydrogen bubbles. The product was subsequently annealed to increase its structural stability. The Cu-Sn alloy was then electrodeposited onto porous Cu which served as a current collector. X-ray diffraction (XRD) studies ascertained that the composition of the Cu-Sn alloy was Cu6Sn5 and scanning electron microscopy (SEM) investigations showed a three-dimensional (3D) porous structure of the electrode. The first charge/discharge capacities of the Cu6Sn5 alloy electrode were measured respectively at 735 and 571 mAh·g-1, and a good retention of the capacities has been determined. Interfacial properties of the Cu6Sn5 alloy electrode in a commercial electrolyte were also studied by electrochemical impedance spectroscopy (EIS).

Key words: Porous Cu current collector, Cu6Sn5 alloy, Lithiumion battery, Anode, Electrochemicalimpedance spectroscopy

MSC2000: 

  • O646