• 文献标题:   Simple method for synthesizing few-layer graphene as cathodes in surface-enabled lithium ion-exchanging cells
  • 文献类型:   Article
  • 作  者:   ZONG J, DIAO YQ, DING F, FENG W, LIU XJ
  • 作者关键词:   graphene, low temperature, shock heating, surfaceenabled lithiumionexchanging cell
  • 出版物名称:   IONICS
  • ISSN:   0947-7047 EI 1862-0760
  • 通讯作者地址:   Tianjin Inst Power Source
  • 被引频次:   2
  • DOI:   10.1007/s11581-016-1690-5
  • 出版年:   2016

▎ 摘  要

In order to realize a wider application for graphene materials specifically in the field of energy storage, a simple and mass-scalable method described as "the atmospheric, low-temperature, shock-heating process" is proposed in this work. During this low-temperature process, the graphite oxide without pre-treatment is completely exfoliated to form the few-layer graphene materials at atmospheric conditions. The Brunauer-Emmett-Teller (BET)-specific surface area of acquired material at 350 degrees C can reach 487 m(2) g(-1). The acquired few-layer graphene materials are also confirmed by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, Fourier transform infrared spectroscopy (FTIR) spectroscopy, X-ray photoelectron spectroscopy (XPS), and high-resolution transmission electron microscopy (HRTEM). The results demonstrate that this simple method is feasible for synthesizing the few-layer graphene materials. Besides that, the acquired graphene is also used as the cathode material in the surface-enabled lithium ion-exchanging cell. The galvanostatic charge/discharge tests show that the graphene prepared from this method is suitable for this system and displays a satisfactory electrochemical performance. The acquired graphene sample exhibits the reversible capacities of around 187, 107, 84, 58, and 45 mAh g(-1) at 0.1, 2, 5, 10, and 15 A g(-1), respectively. At the current density of 0.5 A g(-1), the capacity retention can reach 75 % after 2000 cycles.