中国物理B ›› 2018, Vol. 27 ›› Issue (10): 108201-108201.doi: 10.1088/1674-1056/27/10/108201

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

Performance of n-type silicon/silver composite anode material in lithium ion batteries: A study on effect of work function matching degree

Guo-Jun Xu(徐国军), Chen-Xin Jin(金晨鑫), Kai-Jie Kong(孔凯捷), Xi-Xi Yang(杨西西), Zhi-Hao Yue(岳之浩), Xiao-Min Li(李晓敏), Fu-Gen Sun(孙福根), Hai-Bin Huang(黄海宾), Lang Zhou(周浪)   

  1. Institute of Photovoltaics, Nanchang University, Nanchang 330031, China
  • 收稿日期:2018-06-26 修回日期:2018-07-23 出版日期:2018-10-05 发布日期:2018-10-05
  • 通讯作者: Zhi-Hao Yue E-mail:yuezhihao@ncu.edu.cn
  • 基金资助:

    Project supported by the China Postdoctoral Science Foundation (Grant No. 2016M592115), the Jiangxi Postdoctoral Foundation, China (Grant No. 2015KY12), the Fund from the Jiangxi Provincial Education Department, China (Grant No. 150184), and the Fund from Nanchang University, China (Grant No. CX2017006).

Performance of n-type silicon/silver composite anode material in lithium ion batteries: A study on effect of work function matching degree

Guo-Jun Xu(徐国军), Chen-Xin Jin(金晨鑫), Kai-Jie Kong(孔凯捷), Xi-Xi Yang(杨西西), Zhi-Hao Yue(岳之浩), Xiao-Min Li(李晓敏), Fu-Gen Sun(孙福根), Hai-Bin Huang(黄海宾), Lang Zhou(周浪)   

  1. Institute of Photovoltaics, Nanchang University, Nanchang 330031, China
  • Received:2018-06-26 Revised:2018-07-23 Online:2018-10-05 Published:2018-10-05
  • Contact: Zhi-Hao Yue E-mail:yuezhihao@ncu.edu.cn
  • Supported by:

    Project supported by the China Postdoctoral Science Foundation (Grant No. 2016M592115), the Jiangxi Postdoctoral Foundation, China (Grant No. 2015KY12), the Fund from the Jiangxi Provincial Education Department, China (Grant No. 150184), and the Fund from Nanchang University, China (Grant No. CX2017006).

摘要:

In this paper, two types of silicon (Si) particles ball-milled from n-type Si wafers, respectively, with resistivity values of 1 Ω·cm and 0.001 Ω·cm are deposited with silver (Ag). The Ag-deposited n-type 1-Ω·cm Si particles (n1-Ag) and Ag-deposited n-type 0.001-Ω·cm Si particles (n0.001-Ag) are separately used as an anode material to assemble coin cells, of which the electrochemical performances are investigated. For the matching of work function between n-type 1-Ω·cm Si (n1) and Ag, n1-Ag shows discharge specific capacity of up to 683 mAh·g-1 at a current density of 8.4 A·g-1, which is 40% higher than that of n0.001-Ag. Furthermore, the resistivity of n1-Ag is lower than half that of n0.001-Ag. Due to the mismatch of work function between n-type 0.001-Ω·cm Si (n0.001) and Ag, the discharge specific capacity of n0.001-Ag is 250.2 mAh·g-1 lower than that of n1-Ag after 100 cycles.

关键词: lithium ion battery, silicon anode materials, work function matching, contacts

Abstract:

In this paper, two types of silicon (Si) particles ball-milled from n-type Si wafers, respectively, with resistivity values of 1 Ω·cm and 0.001 Ω·cm are deposited with silver (Ag). The Ag-deposited n-type 1-Ω·cm Si particles (n1-Ag) and Ag-deposited n-type 0.001-Ω·cm Si particles (n0.001-Ag) are separately used as an anode material to assemble coin cells, of which the electrochemical performances are investigated. For the matching of work function between n-type 1-Ω·cm Si (n1) and Ag, n1-Ag shows discharge specific capacity of up to 683 mAh·g-1 at a current density of 8.4 A·g-1, which is 40% higher than that of n0.001-Ag. Furthermore, the resistivity of n1-Ag is lower than half that of n0.001-Ag. Due to the mismatch of work function between n-type 0.001-Ω·cm Si (n0.001) and Ag, the discharge specific capacity of n0.001-Ag is 250.2 mAh·g-1 lower than that of n1-Ag after 100 cycles.

Key words: lithium ion battery, silicon anode materials, work function matching, contacts

中图分类号:  (Lithium-ion batteries)

  • 82.47.Aa
82.45.Fk (Electrodes) 65.40.gh (Work functions) 73.40.Cg (Contact resistance, contact potential)