Acta Phys. -Chim. Sin. ›› 2017, Vol. 33 ›› Issue (8): 1621-1627.doi: 10.3866/PKU.WHXB201704191

• ARTICLE • Previous Articles     Next Articles

One-Step Synthesis of SnS2 Nanoflower/Graphene Nanocomposites with Enhanced Lithium Ion Storage Performance

Ai-Hua TIAN1,2,Wei WEI1,2,Peng QU1,2,*(),Qiu-Ping XIA2,Qi SHEN1,*()   

  1. 1 College of Chemistry and Molecular Engineering, Zhengzhou University, Zhengzhou 450001, P. R. China
    2 Henan Key Laboratory Cultivation Base of Nanobiological Analytical Chemistry, College of Chemistry and Chemical Engineering, Shangqiu Normal University, Shangqiu 476000, Hen Province, P. R. China
  • Received:2017-02-17 Published:2017-06-14
  • Contact: Peng QU,Qi SHEN E-mail:qupeng0212@163.com;shenqi@zzu.edu.cn
  • Supported by:
    the National Natural Science Foundation of China(21575131);the Key Scientific Research Project of High Schools in Henan Province(16A430025);the Key Scientific Research Project of High Schools in Henan Province(17A480009)

Abstract:

SnS2 is considered as an attractive anode material to substitute commercial graphite anodes of lithium-ion batteries due to its high specific capacity of 645 mAh·g-1 as well as low cost. Nevertheless, it suffers poor large volume expansion during the lithiation/delithiation processes, leading to the loss of electrical contact and rapid capacity fading. Herein, by using a facile one-step solvothermal method, SnS2 nanoflower/graphene nanocomposites (SnS2 NF/GNs) were prepared, where flower-like SnS2 hierarchical nanostructures consisting of ultrathin nanoplates, are tightly enwrapped in graphene nanosheets. As anode materials for lithium-ion batteries, the SnS2 NF/GNs electrode exhibit superior electrochemical performance, with a reversible capacity of 523 mAh·g-1 after 200 charge-discharge cycles. The enhanced Li storage performance was attributed to the synergistic effect of SnS2 and graphene. The SnS2 NF can effectively accommodate the volume change and shorten Li+ diffusion distance, while graphene nanosheets can further alleviate the volume expansion of SnS2 and improve the electronic conductivity.

Key words: Lithium-ion battery, Anode, SnS2 nanoflower, Graphene

MSC2000: 

  • O643