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Large-scale synthesis of uniform mesoporous H-Nb2O5/rGO nanocomposites for advanced lithium ion hybrid supercapacitor

Abstract

Large-scale synthesis of uniform graphene-metal oxide nanocomposites is of great interest in energy storage applications, due to the combination of their merits and the synergistic effects on the enhancement of their electrochemical performance. Herein, this study reports a scalable synthesis of uniform mesoporous H-Nb2O5/rGO nanocomposites, which exhibit higher reversible specific capacitance (~190 mAh g−1), better rate capability and cycling stability (the capacitance retention is 96.5% over 500 cycles) than the pristine H-Nb2O5 microflowers, attributed to their large specific surface area (364.17 m2 g−1), porous structure, and intimate interface. More remarkably, the H-Nb2O5/rGO-based lithium ion hybrid supercapacitor (LIHS) delivers a high energy density of 100.2 Wh kg−1 at 50 W kg−1 and still remained 18.3 Wh kg−1 at an ultrahigh power density of 20000 W kg−1, as well as an excellent cycling stability. It is worth noting that some other nanocomposites including Zn2Ti3O8/rGO, Si/rGO, NaNbO3/rGO, Nb4N5/rGO, and H-Nb2O5/2D g-C3N4, has also been successfully synthesized by this method, demonstrating that it can be extended to prepare other functional nanocomposites for the applications of energy conversion and storage, photocatalytic hydrogen production, sensors, and so on.

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Publication details

The article was received on 24 Oct 2018, accepted on 09 Nov 2018 and first published on 08 Dec 2018


Article type: Paper
DOI: 10.1039/C8TA10239B
Citation: J. Mater. Chem. A, 2018, Accepted Manuscript
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    Large-scale synthesis of uniform mesoporous H-Nb2O5/rGO nanocomposites for advanced lithium ion hybrid supercapacitor

    S. Li, T. Wang, W. Zhu, J. Lian, Y. Huang, Y. Yu, J. Qiu, Y. zhao, Y. Yong and H. Li, J. Mater. Chem. A, 2018, Accepted Manuscript , DOI: 10.1039/C8TA10239B

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