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Hybrid nanowires and nanoparticles of WO3 in carbon aerogel for supercapacitor applications

Abstract

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

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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, Accepted Manuscript
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    Hybrid nanowires and nanoparticles of WO3 in carbon aerogel for supercapacitor applications

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

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