Chemical Research in Chinese Universities ›› 2018, Vol. 34 ›› Issue (2): 235-240.doi: 10.1007/s40242-018-7340-x

• Articles • Previous Articles     Next Articles

First-principles Study of Mechanical and Electronic Properties of Co-Sn Intermetallics for Lithium Ion Battery Anode

DONG Wei1,2,3, SHENDing1, YANG Shaobin1, LIANG Bing3, WANG Xuelei1, LIU Yue1, LI Sinan4   

  1. 1. College of Material Science and Engineering, Liaoning Technical University, Fuxin 123000, P. R. China;
    2. Research Center of Coal Resources Safe Mining and Clean Utilization, Liaoning Technical University, Fuxin 123000, P. R. China;
    3. College of Mechanics and Engineering, Liaoning Technical University, Fuxin 123000, P. R. China;
    4. College of Mining, Liaoning Technical University, Fuxin 123000, P. R. China
  • Received:2017-11-03 Revised:2017-12-13 Online:2018-04-01 Published:2018-01-15
  • Contact: SHEN Ding,E-mail:yangshaobin@lntu.edu.cn;YANG Shaobin,E-mail:shending028@163.com E-mail:yangshaobin@lntu.edu.cn;shending028@163.com
  • Supported by:
    Supported by the National Natural Science Foundation of China(Nos.51274119, 51774175) and the Open Projects of Research Center of Coal Resources Safe Mining and Clean Utilization, Liaoning Province, China(No. LNTU16KF15).

Abstract: The equilibrium structures, formation energy, mechanical properties and electronic properties of Co-Sn intermetallics have been systemically studied by first-principles study. The results show that the CoSn phase is more thermodynamically stable than any other stoichiometry of Co-Sn intermetallics. With the increasing of Co content in Co-Sn intermetallics, the mechanical properties change into brittle behavior from ductility character. Adding proper amount of Co to Co-Sn intermetallics can improve the cycle performance for lithium ion battery anode. However, high Co content will lead to a poor cycle performance for Co-Sn intermetallics.

Key words: Co-Sn intermetallic, Mechanical property, Electronic property, First-principle, Lithium ion battery