• 文献标题:   One-Step Synthesis of SnS2 Nanoflower/Graphene Nanocomposites with Enhanced Lithium Ion Storage Performance
  • 文献类型:   Article
  • 作  者:   TIAN AH, WEI W, QU P, XIA QP, SHEN Q
  • 作者关键词:   lithiumion battery, anode, sns2 nanoflower, graphene
  • 出版物名称:   ACTA PHYSICOCHIMICA SINICA
  • ISSN:   1000-6818
  • 通讯作者地址:   Zhengzhou Univ
  • 被引频次:   2
  • DOI:   10.3866/PKU.WHXB201704191
  • 出版年:   2017

▎ 摘  要

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 center dot 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 center dot 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.