• 文献标题:   Enhanced electrochemical performance of NiO by addition of sulfonated graphene for supercapacitors
  • 文献类型:   Article
  • 作  者:   WANG L, TIAN H, ZHANG L, GAO FM, GU JM, HOU L, JIANG Y, WU CQ
  • 作者关键词:  
  • 出版物名称:   RSC ADVANCES
  • ISSN:   2046-2069
  • 通讯作者地址:   Yanshan Univ
  • 被引频次:   2
  • DOI:   10.1039/c5ra09176d
  • 出版年:   2015

▎ 摘  要

A facile approach for the fabrication of NiO/sulfonated graphene composites (NiO/sGNS) using ammonium carbamate as a precipitating agent was developed. With an enhanced specific surface area and a desirable surface chemical environment, the NiO/sulfonated graphene composites exhibit excellent electrochemical performance. The results from cyclic voltammetry (CV) demonstrate that traditional electrical double-layer capacitive processes contribute to improving the storage energy capabilities of the NiO/sGNS composites. Galvanostatic charge-discharge tests show that the specific capacitance of the NiO/sulfonated graphene composites increased to 530 F g(-1) at a current density of 1.0 A g(-1) in comparison with specific capacitances of 382 F g(-1) for NiO/thermal reduced graphene composites (NiO/TRG) and 238 F g(-1) for pristine NiO. Moreover, electrochemical impedance spectroscopy (EIS) indicates the considerable effect of sulfonated graphene on building electron and ion transport channels for faradaic reaction processes of the NiO/sGNS composites.