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Issue 9, 2018
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Hybrid nanowires and nanoparticles of WO3 in a carbon aerogel for supercapacitor applications

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Abstract

In the field of electrochemical energy storage, incorporation of metal oxides into porous carbon has attracted significant attention. Since each advantage of nanoparticles and nanowires of metal oxide has been distinguished for supercapacitor applications, a combination of the advantages of both structures together can meet a capacitive synergy. In this study, WO3 nanowires and nanoparticles were first incorporated into a carbon aerogel (CA) simultaneously via a facile and one-pot route. A comparative study on the capacitive properties of this novel hybrid structure and single nanoparticles in CA was conducted. The introduction of WO3 nanowires with diameter <40 nm provided an additional pair of redox peaks and improved the specific capacitance by 50% and the rate capacity by 61%. The composite within the hybrid nanowires and nanoparticles exhibits an excellent cycling stability of only 2% decay in specific capacitance detected at 50 mV sāˆ’1 for 1000 cycles. The individual contribution of nanowires and nanoparticles to the enhanced capacitance has been discussed, and the enhanced capacitive properties can be ascribed to the hybrid structure better for charge transport during the electrochemical process. More importantly, this route can be extended to incorporate nanowires of other metal oxides into mesoporous carbon, and enhanced capacitive properties can be expected.

Graphical abstract: Hybrid nanowires and nanoparticles of WO3 in a carbon aerogel for supercapacitor applications

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Publication details

The article was received on 27 Sep 2017, accepted on 03 Jan 2018 and first published on 03 Jan 2018


Article type: Paper
DOI: 10.1039/C7NR07191D
Citation: Nanoscale, 2018,10, 4209-4217
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    Hybrid nanowires and nanoparticles of WO3 in a carbon aerogel for supercapacitor applications

    X. Liu, G. Sheng, M. Zhong and X. Zhou, Nanoscale, 2018, 10, 4209
    DOI: 10.1039/C7NR07191D

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