J. Mater. Sci. Technol. ›› 2018, Vol. 34 ›› Issue (9): 1538-1543.DOI: 10.1016/j.jmst.2017.12.018

• Orginal Article • Previous Articles     Next Articles

Formation of CMK-3/Co3O4 nanosheets on nickel foam with markedly enhanced pseudocapacitive properties

Guoxiong Zhanga, Yuemei Chena, Yingjian Jianga, Chuan Linb, Yigang Chena*(), Haibo Guoa   

  1. a Department of Electronic Information Materials, School of Materials Science and Engineering, Shanghai University, Shanghai, 200444, China
    b China Technology Center, GE Global Research, Shanghai, 201203, China
  • Received:2017-07-21 Revised:2017-08-29 Accepted:2017-11-21 Online:2018-09-20 Published:2018-09-25
  • Contact: Chen Yigang

Abstract:

Composites of mesoporous carbon (CMK-3) and Co3O4 nanosheets grown on nickel foam were successfully synthesized by a simple route. A bare Co3O4 film was synthesized for comparison. With the addition of CMK-3, the Co3O4 nanoparticles self-organize and agglomerate into nanosheets, showing a significant influence by CMK-3 on the morphology. The CMK-3/Co3O4 exhibits an optimal specific capacitance of 1131.3 F g-1 in 3 mol L-1 KOH aqueous electrolyte at 0.5 A g-1, and a retention ratio of 91% over 3000 cycles, both being much higher than that achieved from the bare Co3O4 film (727 F g-1 of specific capacitance, and 82% capacitance retention ratio), indicating that the CMK-3/Co3O4 nanosheets are very promising as electrode materials for supercapacitor applications.

Key words: CMK-3, Nanosheet, Cobalt oxide, Energy storage, Supercapacitor