• 文献标题:   MoS2-coated vertical graphene nanosheet for high-performance rechargeable lithium-ion batteries and hydrogen production
  • 文献类型:   Article
  • 作  者:   WANG Y, CHEN B, SEO DH, HAN ZJ, WONG JI, OSTRIKOV K, ZHANG H, YANG HY
  • 作者关键词:  
  • 出版物名称:   NPG ASIA MATERIALS
  • ISSN:   1884-4049 EI 1884-4057
  • 通讯作者地址:   Singapore Univ Technol Design
  • 被引频次:   64
  • DOI:   10.1038/am.2016.44
  • 出版年:   2016

▎ 摘  要

Hybrid nanostructures composed of vertical graphene nanosheet (VGNS) and MoS2 nano-leaves are synthesized by the chemical vapor deposition method followed by a solvothermal process. The unique three-dimensional nanostructures of MoS2/VGNS arranged in a vertically aligned manner can be easily constructed on various substrates, including Ni foam and graphite paper. Compared with MoS2/carbon black, MoS2/VGNS nanocomposites grown on Ni foam exhibit enhanced electrochemical performance as the anode material of lithium-ion batteries, delivering a specific capacity of 1277 mAh g(-1) at a current density of 100 mAh g(-1) and a high first-cycle coulombic efficiency of 76.6%. Moreover, the MoS2/VGNS nanostructures also retain a capacity of 1109 mAh g(-1) after 100 cycles at a current density of 200 mA g(-1), suggesting excellent cycling stability. In addition, when the MoS2/VGNS nanocomposites grown on graphite paper are applied in the hydrogen evolution reaction, a small Tafel slope of 41.3 mV dec(-1) and a large double-layer capacitance of 7.96 mF cm(-2) are obtained, which are among the best values achievable by MoS2-based hybrid structures. These results demonstrate the potential applications of MoS2/VGNS hybrid materials for energy conversion and storage and may open up a new avenue for the development of vertically aligned, multifunctional nanoarchitectures.