Jump to main content
Jump to site search

Issue 7, 2018
Previous Article Next Article

Hierarchical 3D NiFe2O4@MnO2 core–shell nanosheet arrays on Ni foam for high-performance asymmetric supercapacitors

Author affiliations

Abstract

Hierarchical NiFe2O4@MnO2 core–shell nanosheet arrays (NSAs) were synthesized on Ni foam as an integrated electrode for supercapacitors, using a facile two-step hydrothermal method followed by calcination treatment. The NiFe2O4 nanosheets were designed as the core and ultrathin MnO2 nanoflakes as the shell, creating a unique three-dimensional (3D) hierarchical electrode on Ni foam. The composite electrode exhibited remarkable electrochemical performance with a high specific capacitance of 1391 F g−1 at a current density of 2 mA cm−2 and long cycling stability at a high current density of 10 mA cm−2 (only 11.4% loss after 3000 cycles). Additionally, an asymmetric supercapacitor (ASC) device was fabricated with a NiFe2O4@MnO2 composite as the positive electrode material and activated carbon (AC) as the negative one. The ASC device exhibited a high energy density (45.2 W h kg−1) at a power density of 174 W kg−1, and an excellent cycling stability over 3000 cycles with 92.5% capacitance retention. The remarkable electrochemical performance demonstrated its great potential as a promising candidate for high-performance supercapacitors.

Graphical abstract: Hierarchical 3D NiFe2O4@MnO2 core–shell nanosheet arrays on Ni foam for high-performance asymmetric supercapacitors

Back to tab navigation

Supplementary files

Publication details

The article was received on 02 Nov 2017, accepted on 02 Jan 2018 and first published on 09 Jan 2018


Article type: Paper
DOI: 10.1039/C7DT04127F
Citation: Dalton Trans., 2018,47, 2266-2273
  •   Request permissions

    Hierarchical 3D NiFe2O4@MnO2 core–shell nanosheet arrays on Ni foam for high-performance asymmetric supercapacitors

    X. Zhang, Z. Zhang, S. Sun, Q. Sun and X. Liu, Dalton Trans., 2018, 47, 2266
    DOI: 10.1039/C7DT04127F

Search articles by author

Spotlight

Advertisements