• 文献标题:   Synthesis of three-dimensional self-standing graphene/Ni(OH)(2) composites for high-performance supercapacitors
  • 文献类型:   Article
  • 作  者:   JIANG CH, ZHAN BB, LI C, HUANG W, DONG XC
  • 作者关键词:  
  • 出版物名称:   RSC ADVANCES
  • ISSN:   2046-2069
  • 通讯作者地址:   Nanjing Univ Posts Telecommun
  • 被引频次:   26
  • DOI:   10.1039/c4ra00916a
  • 出版年:   2014

▎ 摘  要

Using surface active agents, three-dimensional (3D) self-standing graphene/Ni(OH)(2) composites with different morphologies, such as nanoflowers, nanoslices and nanoparticles, are directly synthesized by a facile in situ electrodeposition method. SEM and Raman spectroscopy are used to investigate the morphologies and structures. Detailed electrochemical characterizations reveal that the 3D graphene/Ni(OH)(2) nanoflower exhibits high specific capacitance (718.2 F g (-1) at 6.7A g(-1) in 6.0 M KOH aqueous solution) and good cycling performance (84.2% capacitance retention after 500 cycles) compared with those of other Ni(OH)(2) morphologies. Nyquist plot investigation shows that 3D graphene/Ni(OH)(2) nanoflowers present a low equivalent series resistance. These results indicate that the composite may be a promising candidate for high-performance supercapacitors.