• 文献标题:   Hierarchically assembled 3D nanoflowers and 0D nanoparticles of nickel sulfides on reduced graphene oxide with excellent lithium storage performances
  • 文献类型:   Article
  • 作  者:   TRONGANH N, GAO Y, JIANG W, TAO HH, WANG SS, ZHAO B, JIANG Y, CHEN ZW, JIAO Z
  • 作者关键词:   nickel sulfide, reduced graphene oxide, heterostructured nanocomposite, structure directing agent, formation mechanism
  • 出版物名称:   APPLIED SURFACE SCIENCE
  • ISSN:   0169-4332 EI 1873-5584
  • 通讯作者地址:   Shanghai Univ
  • 被引频次:   7
  • DOI:   10.1016/j.apsusc.2017.12.206
  • 出版年:   2018

▎ 摘  要

Constructing heterostructure can endow composites with many novel physical and electrochemical properties due to the built-in specific charge transfer dynamics. However, controllable fabrication route to heterostructures is still a great challenge up to now. In this work, a SiO2-assisted hydrothermal method is developed to fabricate heterostructured nickel sulfides/reduced graphene oxide (NiSx/rGO) composite. The SiO2 particles hydrolyzed from tetraethyl orthosilicate could assist the surface controllable co-growth of 3D nanoflowers and 0D nanoparticles of Ni3S2/NiS decorated on reduced graphene oxide, and the possible co-growth mechanism is discussed in detail. In this composite, the heterostructured nanocomposite with different morphologies, chemical compositions and crystal structures, along with varied electronic states and band structure, can promote the interface charge transfer kinetics and lead to excellent lithium storage performances. Electrochemical measurements reveal that the NiSx/rGO composite presents 1187.0 mA h g(-1) at 100 mA g(-1) and achieves a highly stable capacity of 561.2 mA h g(-1) even when the current density is up to 5 A g(-1). (C) 2018 Elsevier B.V. All rights reserved.