J. Mater. Sci. Technol. ›› 2017, Vol. 33 ›› Issue (8): 775-780.DOI: 10.1016/j.jmst.2016.09.017

• Orginal Article • Previous Articles     Next Articles

Wrinkled Graphene-Reinforced Nickel Sulfide Thin Film as High-Performance Binder-Free Anode for Sodium-Ion Battery

Xia Xueke1, Xie Jian1,2(), Zhang Shichao3, Pan Bin4, Cao Gaoshao2, Zhao Xinbing1,2   

  1. 1 State Key Laboratory of Silicon Materials, School of Materials Science and Engineering, Zhejiang University, Hangzhou 310027, China
    2Key Laboratory of Advanced Materials and Applications for Batteies of Zhejiang Province, Hangzhou 310027, China
    3 School of Materials Science and Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, China
    4 Industrial Technology Research Institute of Zhejiang University, Hangzhou 310058, China
  • Received:2016-07-10 Revised:2016-08-16 Accepted:2016-09-21 Online:2017-08-20 Published:2017-10-31

Abstract:

Sodium-ion batteries (SIBs) recently have received a worldwide attention due to the resource abundance of sodium and similar battery chemistry with lithium-ion batteries (LIBs). However, search for suitable anodes for SIBs still remains a challenge since graphitized carbon, the anode for commercial LIBs, usually exhibits low electrochemical Na-storage activity. In this work, a unique graphene-reinforced Ni3S2 thin film (Ni3S2/G) has been constructed and investigated as a promising anode for SIBs. The Ni3S2 thin film has a thickness of 200-300 nm and is composed of small sized crystals of around 100 nm. The graphene has a wrinkled surface profile which offers three-dimensional networks for electron conductivity and structural reinforcement. The Ni3S2/G thin film exhibits high capacity, excellent cycling stability and good rate capability due to the introduction of wrinkled graphene. Ni3S2/G can deliver a high initial capacity of 791 mAh g-1 at 50 mA g-1. The capacity can be maintained at 563 mAh g-1 after 110 cycles. This work provides a unique design for high-performance SIBs anodes.

Key words: Sodium ion battery, Anode, Wrinkled graphene, Nickel sulfide, Thin film