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MoO3 nanobelts for high-performance asymmetric supercapacitor

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Abstract

This study reports on MoO3 nanobelts as electrode material for high-performance supercapacitors. We find MoO3 nanobelts electrode exhibits a higher specific capacitance than MoO3 microrods electrode. Thus, an asymmetric supercapacitor utilizing the as-prepared MoO3 nanobelts as the positive electrode material and the carbon nanosheets as the negative electrode material achieves an impressive performance with an energy density of 25.69 Wh kg−1 at a power density of 1482.25 W kg−1. We further reveal that the exposed (010) facets in the crystalline MoO3 nanobelts might mainly contribute to its electrochemical performance.

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Acknowledgements

This work was financially supported by the Fundamental Research Funds for the Central Universities (HUST: 2016YXMS031) and the Director Fund of the WNLO. We thank the facility support of the Analytical and Testing Centre at Huazhong University of Science and Technology and the Center for Nanoscale Characterization and Devices of WNLO.

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Correspondence to Yan Shen.

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Wang, L., Gao, L., Wang, J. et al. MoO3 nanobelts for high-performance asymmetric supercapacitor. J Mater Sci 54, 13685–13693 (2019) doi:10.1007/s10853-019-03836-7

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