Chem. J. Chinese Universities ›› 2017, Vol. 38 ›› Issue (11): 2031.doi: 10.7503/cjcu20170056

• Physical Chemistry • Previous Articles     Next Articles

Preparation of NF/rGO/Co3O4/NiO Electrode and Its Application in Supercapacitor

LI Yingying1, ZHANG Qi1, ZHANG Yiheng2, WANG Lei1,*()   

  1. 1. College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology, Qingdao 266042, China
    2. Chinesisch-Deutsche Technische Fakultät,Qingdao University of Science and Technology, Qingdao 266042, China
  • Received:2017-01-23 Online:2017-11-10 Published:2017-10-30
  • Contact: WANG Lei E-mail:inorchemwl@126.com
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.51372125, 21571112) and the Shandong Province Natural Science Foundation, China(No.ZR2016EMP02)

Abstract:

The electrochemical deposition method was used to prepare NF/rGO/Co3O4 and NF/rGO/Co3O4/NiO electrodes(NF=nickel foam; rGO=reduced graphene oxide). Here, with NF as a current collector, rGO, Co3O4 and NiO were grown on NF directly without any binder under specific conditions including optimized potential, time and concentration. NF/rGO/Co3O4 and NF/rGO/Co3O4/NiO electrodes were used as the electrode of supercapacitor, and three-electrode system was employed in cyclic voltammetry, galvanostatic charge-discharge and electrochemical impe-dance spectroscopy characterization of the electrodes. The results showed that the capacitance of NF/rGO/Co3O4/NiO electrode was 1188.6 F/g at 2 A/g; its rate capability was 75.7% when the current density varied from 2 A/g to 12 A/g; and its cycling stability was 80.5% after 2000 times. Compared with NF/rGO/Co3O4, the supercapacitor performance of NF/rGO/Co3O4/NiO electrode improved a lot, which can be attributed to the synergistic effect of Co3O4 and NiO. What’s more, rGO could enhance the electroconductivity of electrodes to a large extent.

Key words: Supercapacitor, Electrochemical deposition, Reduced graphene oxide(rGO), Metallic oxide

CLC Number: 

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