Jump to main content
Jump to site search


Simple synthesis of graphene-doped flower-like cobalt–nickel–tungsten–boron oxides with self-oxidation for high-performance supercapacitors

Abstract

In this study, we devised an easy and simple approach to synthesize a composite of flower-like cobalt–nickel–tungsten–boron oxides (Co–Ni–W–B–O) that were doped with reduced graphene oxide (rGO); the composite was designed for supercapacitor applications. A Co–Ni–W–B alloy was first deposited on rGO through one-pot chemical reduction in an ethanol solution at room temperature. The resulting Co–Ni–W–B alloy self-oxidized in the air on the rGO surface. The Co–Ni–W–B–O/rGO composites resembled three-dimensional flowers with high surface area; they also exhibited superior electrochemical performance when compared to most previously reported electrodes based on nickel–cobalt oxides. Furthermore, the Co–Ni–W–B–O/rGO composite prepared in an ethanol solution showed much higher electrochemical performance than that the composite prepared in water. The Co–Ni–W–B–O/rGO electrode showed an ultrahigh specific capacitance of 1189.1 F g−1 at 1 A g−1 and exhibited an high energy density of 49.9 Wh kg −1 along with remarkable cycle stability (10000 cycles with 80.7% capacitance retention at 15 A g−1), which is promising for application in energy storage devices.

Back to tab navigation
Please wait while Download options loads

Supplementary files

Publication details

The article was received on 08 Jan 2017, accepted on 21 Apr 2017 and first published on 21 Apr 2017


Article type: Paper
DOI: 10.1039/C7TA00234C
Citation: J. Mater. Chem. A, 2017, Accepted Manuscript
  •   Request permissions

    Simple synthesis of graphene-doped flower-like cobalt–nickel–tungsten–boron oxides with self-oxidation for high-performance supercapacitors

    C. Xiang, Q. Wang, Y. Zou, P. Huang, H. Chu, S. Qiu, F. Xu and L. Sun, J. Mater. Chem. A, 2017, Accepted Manuscript , DOI: 10.1039/C7TA00234C

Search articles by author