Jump to main content
Jump to site search

Issue 13, 2018
Previous Article Next Article

Graphene and activated carbon-wrapped and Co3O4-intercalated 3D sandwich nanostructure hybrid for high-performance supercapacitance

Author affiliations

Abstract

A graphene/Co3O4/activated carbon (GCA) hybrid with excellent electrochemical properties for supercapacitance was successfully fabricated via a simple two-step hydrothermal method. The as-synthesized hybrid was examined by transmission electron microscopy (TEM), X-ray diffraction (XRD), and electrochemical characterization. The results confirmed that Co3O4 particles were homogeneously distributed between the graphene and activated carbon layers. The GCA 1 : 9 capacitor (GC : AC = 9 : 1) showed the best electrochemical property compared with other hybrid capacitors. The specific capacitance of the GCA 1 : 9 hybrid capacitor is 564 F g−1 with activated carbon (AC) covering the outside of the graphene/Co3O4 (GC) layers. The specific capacitance of the GCA 1 : 9 was improved by 53.26% compared with the GC composite capacitor (368 F g−1) at 50 mA g−1 in 7 M KOH. The GCA 1 : 9 also exhibits outstanding cycling property with 90.43% capacitance retention over 10 000 cycles at a current density of 20 A g−1. Moreover, it also achieved a high energy density of 35.7 W h kg−1 at a power density of 235.5 W kg−1, demonstrating that it is a promising candidate for supercapacitance.

Graphical abstract: Graphene and activated carbon-wrapped and Co3O4-intercalated 3D sandwich nanostructure hybrid for high-performance supercapacitance

Back to tab navigation

Publication details

The article was received on 09 Mar 2018, accepted on 25 Apr 2018 and first published on 03 May 2018


Article type: Paper
DOI: 10.1039/C8NJ01160E
Citation: New J. Chem., 2018,42, 10733-10740
  •   Request permissions

    Graphene and activated carbon-wrapped and Co3O4-intercalated 3D sandwich nanostructure hybrid for high-performance supercapacitance

    Y. Li, M. Jia, L. Xu, J. Gao, F. Zhang and X. Jin, New J. Chem., 2018, 42, 10733
    DOI: 10.1039/C8NJ01160E

Search articles by author

Spotlight

Advertisements