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A New Benchmark Capacitance for Supercapacitor Anodes by Mixed-Valence Sulfur-Doped V6O13−x

Authors

  • Teng Zhai,

    1. KLGHEI of Environment and Energy Chemistry, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, P.R. China
    2. Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA, USA
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  • Xihong Lu,

    1. KLGHEI of Environment and Energy Chemistry, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, P.R. China
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  • Yichuan Ling,

    1. Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA, USA
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  • Minghao Yu,

    1. KLGHEI of Environment and Energy Chemistry, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, P.R. China
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  • Gongming Wang,

    1. Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA, USA
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  • Tianyu Liu,

    1. Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA, USA
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  • Chaolun Liang,

    1. KLGHEI of Environment and Energy Chemistry, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, P.R. China
    2. Instrumental Analysis and Research Centre, Sun Yat-Sen University, Guangzhou, P.R. China
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  • Yexiang Tong,

    Corresponding author
    1. KLGHEI of Environment and Energy Chemistry, MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry, School of Chemistry and Chemical Engineering, Sun Yat-Sen University, Guangzhou, P.R. China
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  • Yat Li

    Corresponding author
    1. Department of Chemistry and Biochemistry, University of California, Santa Cruz, CA, USA
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Abstract

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A new pseudocapacitor anode, sulfur-doped V6O13−x, is reported. It achieves a benchmark capacitance of 1353 F/g (0.72 F/cm2) at a current density of 1.9 A/g (1 mA/cm2) in 5 M LiCl solution. The charges are stored chemically in the electrode via reversible redox reactions that involve multiple oxidation states of vanadium (V3+, V4+ and V5+).

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