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Construction of High-Energy-Density Supercapacitors from Pine-Cone-Derived High-Surface-Area Carbons

Authors

  • Dr. Kaliyappan Karthikeyan,

    Corresponding author
    1. Faculty of Applied Chemical Engineering, Chonnam National University, Gwang-ju 500-757 (Republic of Korea)
    2. Department of Mechanical and Materials Engineering, The University of Western Ontario, London, Ontario, N6 A 5B9 (Canada)
    • Faculty of Applied Chemical Engineering, Chonnam National University, Gwang-ju 500-757 (Republic of Korea)

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  • Samuthirapandiyan Amaresh,

    1. Faculty of Applied Chemical Engineering, Chonnam National University, Gwang-ju 500-757 (Republic of Korea)
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  • Sol Nip Lee,

    1. Faculty of Applied Chemical Engineering, Chonnam National University, Gwang-ju 500-757 (Republic of Korea)
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  • Prof. Xueliang Sun,

    1. Department of Mechanical and Materials Engineering, The University of Western Ontario, London, Ontario, N6 A 5B9 (Canada)
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  • Dr. Vanchiappan Aravindan,

    1. Energy Research Institute (ERI@N), Nanyang Technological University, Research Techno Plaza, 50 Nanyang Drive, Singapore 637553 (Singapore)
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  • Dr. Young-Gi Lee,

    1. Power Control Device Research Team, Electronics and Telecommunications Research Institute, Daejeon 305-700 (Republic of Korea)
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  • Prof. Yun Sung Lee

    Corresponding author
    1. Faculty of Applied Chemical Engineering, Chonnam National University, Gwang-ju 500-757 (Republic of Korea)
    • Faculty of Applied Chemical Engineering, Chonnam National University, Gwang-ju 500-757 (Republic of Korea)

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Abstract

Very high surface area activated carbons (AC) are synthesized from pine cone petals by a chemical activation process and subsequently evaluated as an electrode material for supercapacitor applications in a nonaqueous medium. The maximum specific surface area of ∼3950 m2 g−1 is noted for the material treated with a 1:5 ratio of KOH to pine cone petals (PCC5), which is much higher than that reported for carbonaceous materials derived from various other biomass precursors. A symmetric supercapacitor is fabricated with PCC5 electrodes, and the results showed enhanced supercapacitive behavior with the highest energy density of ∼61 Wh kg−1. Furthermore, outstanding cycling ability is evidenced for such a configuration, and ∼90 % of the initial specific capacitance after 20 000 cycles under harsh conditions was observed. This result revealed that the pine-cone-derived high-surface-area AC can be used effectively as a promising electrode material to construct high-energy-density supercapacitors.

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