Jump to main content
Jump to site search

Issue 17, 2019
Previous Article Next Article

Designing an asymmetric device based on graphene wrapped yolk–double shell NiGa2S4 hollow microspheres and graphene wrapped FeS2–FeSe2 core–shell cratered spheres with outstanding energy density

Author affiliations

Abstract

Herein, we present a new method to construct a graphene wrapped yolk–double shell NiGa2S4 hollow microsphere (GW@YDSNGSHM) as a cathode electrode and a graphene wrapped FeS2–FeSe2 core–shell cratered sphere (GW-FeS2–FeSe2-CSS) as an anode electrode to enhance the performance of asymmetric supercapacitors. The GW@YDSNGSHM electrode shows considerable improvement of electrochemical performance including small internal resistance, reversibility, rapid kinetics, exceptional durability, and a notable specific capacitance (SC) of 2868.4 F g−1. The advancement in the performance of the GW-FeS2–FeSe2-CSS includes a good SC of 634.6 F g−1 and preferable durability. An asymmetric supercapacitor composed of the GW@YDSNGSHM (cathode) and GW-FeS2–FeSe2-CSS (anode) was assembled and tested. The advanced device revealed a SC of 352.30 F g−1 and an energy density (ED) of 158.53 W h kg−1 at a power density (PD) of 2236.16 W kg−1. This improved performance is related to the structural properties of both electrodes which can ensure promising potential for future generations of electronic devices.

Graphical abstract: Designing an asymmetric device based on graphene wrapped yolk–double shell NiGa2S4 hollow microspheres and graphene wrapped FeS2–FeSe2 core–shell cratered spheres with outstanding energy density

Back to tab navigation

Supplementary files

Publication details

The article was received on 15 Jan 2019, accepted on 15 Mar 2019 and first published on 18 Mar 2019


Article type: Paper
DOI: 10.1039/C9TA00532C
Citation: J. Mater. Chem. A, 2019,7, 10282-10292

  •   Request permissions

    Designing an asymmetric device based on graphene wrapped yolk–double shell NiGa2S4 hollow microspheres and graphene wrapped FeS2–FeSe2 core–shell cratered spheres with outstanding energy density

    A. Mohammadi Zardkhoshoui, S. S. Hosseiny Davarani, M. Maleka Ashtiani and M. Sarparast, J. Mater. Chem. A, 2019, 7, 10282
    DOI: 10.1039/C9TA00532C

Search articles by author

Spotlight

Advertisements