• 文献标题:   Sulfur covalently bonded graphene with large capacity and high rate for high-performance sodium-ion batteries anodes
  • 文献类型:   Article
  • 作  者:   WANG XL, LI G, HASSAN FM, LI JD, FAN XY, BATMAZ R, XIAO XC, CHEN ZW
  • 作者关键词:   sodiumion battery, sulfur doped graphene, covalent bonding, nanoporou, long stability, high rate
  • 出版物名称:   NANO ENERGY
  • ISSN:   2211-2855 EI 2211-3282
  • 通讯作者地址:   Univ Waterloo
  • 被引频次:   86
  • DOI:   10.1016/j.nanoen.2015.05.038
  • 出版年:   2015

▎ 摘  要

Na-ion battery is playing an important role as a low-cost alternative power source to Li-ion battery. Developing novel carbonaceous anode materials is highly demanded for high performance and environmental benignity. We report, for the first time, the graphene sheets covalently bonded with sulfur atoms as Na-ion battery anode material with a large reversible capacity of 291 mA h g(-1) and an outstanding rate capability with 127 and 83 mA h g(-1) at 2.0 and 5.0 A g (charging/discharging in 3.8 and 1 min, respectively), and a long cycling stability as well. Both experiment and density functional theory calculation proves that the superior performance is mainly attributed to the unique nanoporous structure stemmed from the chemically S doping. This material holds great promise in future application of low cost, high-performance Na-ion batteries. (C) 2015 Elsevier Ltd. All rights reserved.