• 文献标题:   Graphene supported Li2SiO3/Li4Ti5O12 nanocomposites with improved electrochemical performance as anode material for lithium-ion batteries
  • 文献类型:   Article
  • 作  者:   WANG QF, YANG S, MIAO J, LU MW, WEN T, SUN JF
  • 作者关键词:   graphene, li2sio3, li4ti5o12, hydrothermal route, electrochemical propertie
  • 出版物名称:   APPLIED SURFACE SCIENCE
  • ISSN:   0169-4332 EI 1873-5584
  • 通讯作者地址:   Henan Polytech Univ
  • 被引频次:   9
  • DOI:   10.1016/j.apsusc.2017.01.221
  • 出版年:   2017

▎ 摘  要

Graphene supported Li2SiO3@Li4Ti5O12 (GE@LSO/LTO) nanocomposites have been synthesized via a hydrothermal route and following calcination. LSO/LTO nanospheres are adhered to the graphene nanosheets with the size of 50-100 nm, in which both LSO and LTO particles are attached together. When tested as the anode for lithium ion batteries, the initial discharge and charge capacities of GE@LSO/LTO are 720.6 mAh g(-1) and 463.4 mAh g(-1) at the current density of 150 mA g(-1). After 200 cycles, the discharge and charge capacities can be remained of 399.2 mAh g(-1) and 398.9 mAh g(-1), respectively. Moreover, the charge rate capacities of GE@LSO/LTO composites retain 89.1% at the range of current density from 150 mA g(-1) to 750 mA g(-1). And its recovery rates are 91.0% when the current density back to 150 mA g(-1). In addition, the reversible capacity and cycle stability of GE@LSO/LTO are better than that of LTO and LSO/LTO. The reasons can be attributed to the synergistic effect between GE and LSO/LTO as well as the features of GE supports. (C) 2017 Elsevier B.V. All rights reserved.