Jump to main content
Jump to site search

Issue 36, 2017
Previous Article Next Article

An asymmetric supercapacitor with excellent cycling performance realized by hierarchical porous NiGa2O4 nanosheets

Author affiliations

Abstract

Rational design of the composition and electrochemically favorable structural configuration of electrode materials are highly required to develop high-performance supercapacitors. Here, we report our findings on the design of interconnected NiGa2O4 nanosheets as advanced cathode electrodes for supercapacitors. Rietveld refinement analysis demonstrates that the incorporation of Ga into NiO leads to a larger cubic lattice parameter that promotes faster charge-transfer kinetics, enabling significantly improved electrochemical performance. The NiGa2O4 electrode delivers a specific capacitance of 1508 F g−1 at a current density of 1 A g−1 with a capacitance retention of 63.7% at 20 A g−1, together with excellent cycling stability after 10 000 charge–discharge cycles (capacitance retention of 102.4%). An asymmetric supercapacitor device was assembled by using NiGa2O4 and Fe2O3 as cathode and anode electrodes, respectively. The ASC delivers a high energy density of 45.2 W h kg−1 at a power density of 1600 W kg−1 with exceptional cycling stability (94.3% cell capacitance retention after 10 000 cycles). These results suggest that NiGa2O4 can serve as a new class cathode material for advanced electrochemical energy storage applications.

Graphical abstract: An asymmetric supercapacitor with excellent cycling performance realized by hierarchical porous NiGa2O4 nanosheets

Back to tab navigation

Supplementary files

Publication details

The article was received on 24 Jun 2017, accepted on 11 Aug 2017 and first published on 12 Aug 2017


Article type: Paper
DOI: 10.1039/C7TA05493A
Citation: J. Mater. Chem. A, 2017,5, 19046-19053
  •   Request permissions

    An asymmetric supercapacitor with excellent cycling performance realized by hierarchical porous NiGa2O4 nanosheets

    S. Liu, K. S. Hui, K. N. Hui, H. Li, K. W. Ng, J. Xu, Z. Tang and S. C. Jun, J. Mater. Chem. A, 2017, 5, 19046
    DOI: 10.1039/C7TA05493A

Search articles by author

Spotlight

Advertisements