• 文献标题:   Perpendicular edge oriented graphene foam supporting orthogonal TiO2(B) nanosheets as freestanding electrode for lithium ion battery
  • 文献类型:   Article
  • 作  者:   REN GF, HOQUE MNF, LIU JW, WARZYWODA J, FAN ZY
  • 作者关键词:   tio2 b, graphene foam, vertically oriented graphene, edge oriented graphene foam, freestanding electrode, lithium ion battery
  • 出版物名称:   NANO ENERGY
  • ISSN:   2211-2855 EI 2211-3282
  • 通讯作者地址:   Texas Tech Univ
  • 被引频次:   34
  • DOI:   10.1016/j.nanoen.2016.01.010
  • 出版年:   2016

▎ 摘  要

We report three-dimensional (3D) freestanding electrodes based on edge-oriented multilayer graphene (EOG) foam loaded with oriented TiO2 (B) nanosheets for lithium ion battery that exhibits large capacity and extremely long cycling stability. In contrast to the commonly reported graphene/graphite foams (GFs) that consist of lateral graphene/graphite sheets, EOG foam, with perpendicular graphene network to fully expose the chemically active graphene edges, was developed as a better scaffold to support active materials. Orthogonally oriented TiO2(B) nanosheets were densely grown on the EOG foam but had straight channels for facile electrolyte access, thus producing a rationally-designed nanostructured architecture. Such a TiO2(B)/EOG freestanding electrode demonstrated large capacities and high-rate performance. Particularly, it exhibited unprecedented cycling stability with capacity retention of 82% after 12,000 charge-discharge (C-D) cycles. It is expected this new electrode architecture as well as the EOG foam will find broad applications in further development of high performance lithium ion batteries and other electrochemical energy technologies. (C) 2016 Elsevier Ltd. All rights reserved.