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A Polyoxovanadate as an Advanced Electrode Material for Supercapacitors

Authors

  • Han-Yi Chen ,

    1. TUM CREATE, 1 CREATE Way, #10-02 CREATE Tower, 138602 Singapore (Singapore)
    2. School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore (Singapore)
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  • Dr. Grace Wee ,

    1. School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore (Singapore)
    2. Energy Research Institute @ NTU (ERI@N), Research Techno Plaza, 50 Nanyang Drive, 637553 Singapore (Singapore)
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  • Dr. Rami Al-Oweini,

    1. School of Engineering and Science, Jacobs University, P.O. Box 750561, 28725 Bremen (Germany)
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  • Jochen Friedl ,

    1. TUM CREATE, 1 CREATE Way, #10-02 CREATE Tower, 138602 Singapore (Singapore)
    2. Department of Physics E19, Technische Universität München, James-Franck Strasse 1, 85748 Garching (Germany)
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  • Kim Soon Tan,

    1. School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore (Singapore)
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  • Dr. Yuxi Wang,

    1. TUM CREATE, 1 CREATE Way, #10-02 CREATE Tower, 138602 Singapore (Singapore)
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  • Dr. Chui Ling Wong ,

    1. School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore (Singapore)
    2. Energy Research Institute @ NTU (ERI@N), Research Techno Plaza, 50 Nanyang Drive, 637553 Singapore (Singapore)
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  • Prof. Ulrich Kortz,

    1. School of Engineering and Science, Jacobs University, P.O. Box 750561, 28725 Bremen (Germany)
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  • Prof. Ulrich Stimming ,

    Corresponding author
    1. TUM CREATE, 1 CREATE Way, #10-02 CREATE Tower, 138602 Singapore (Singapore)
    2. Department of Physics E19, Technische Universität München, James-Franck Strasse 1, 85748 Garching (Germany)
    3. Institute for Advanced Study (IAS) of the Technische Universität München, Lichtenbergstrasse 2a, 85748 Garching (Germany)
    • TUM CREATE, 1 CREATE Way, #10-02 CREATE Tower, 138602 Singapore (Singapore)===

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  • Prof. Madhavi Srinivasan

    Corresponding author
    1. TUM CREATE, 1 CREATE Way, #10-02 CREATE Tower, 138602 Singapore (Singapore)
    2. School of Materials Science and Engineering, Nanyang Technological University, 639798 Singapore (Singapore)
    3. Energy Research Institute @ NTU (ERI@N), Research Techno Plaza, 50 Nanyang Drive, 637553 Singapore (Singapore)
    • TUM CREATE, 1 CREATE Way, #10-02 CREATE Tower, 138602 Singapore (Singapore)===

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Abstract

Polyoxovanadate Na6V10O28 is investigated for the first time as electrode material for supercapacitors (SCs). The electrochemical properties of Na6V10O28 electrodes are studied in Li+-containing organic electrolyte (1 M LiClO4 in propylene carbonate) by galvanostatic charge/discharge and cyclic voltammetry in a three-electrode configuration. Na6V10O28 electrodes exhibit high specific capacitances of up to 354 F g−1. An asymmetric SC with activated carbon as positive electrode and Na6V10O28 as negative electrode is fabricated and exhibits a high energy density of 73 Wh kg−1 with a power density of 312 W kg−1, which successfully demonstrates that Na6V10O28 is a promising electrode material for high-energy SC applications.

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