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Hierarchically porous carbon derived from tobacco waste by one‑step molten salt carbonization for supercapacitor KCI 등재

  • 언어ENG
  • URLhttps://db.koreascholar.com/Article/Detail/420734
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Carbon Letters (Carbon letters)
한국탄소학회 (Korean Carbon Society)
초록

High-performance carbon materials were prepared via a one-step molten salt carbonization of tobacco waste used as electrode materials for supercapacitors. Carbon material prepared by carbonization for 3 h in molten CaCl2 at 850 °C exhibits hierarchically porous structure and ideal capacitive behavior. In a three-electrode configuration with 1 mol L− 1 H2SO4 aqueous solution, it delivers specific capacitance of 196.5 F g− 1 at 0.2 A g− 1, energy density of 27.2 Wh kg− 1 at 0.2 A g− 1, power density of 983.5 W kg− 1 at 2 A g− 1, and excellent cyclic stability with 94% capacitance retention after 5000 charge–discharge cycles at 1 A g− 1. Moreover, in a symmetrical two-electrode configuration with 6 mol L− 1 KOH aqueous solution, it delivers specific capacitance of 111.1 F g− 1 at 0.2 A g− 1, energy density of 3.8 Wh kg− 1 at 0.2 A g− 1, and power density of 482.0 W kg− 1 at 2 A g− 1. The relationship between hierarchically porous structure and capacitive performance is also discussed.

목차
    Abstract
    1 Introduction
    2 Experimental
        2.1 Materials and chemicals
        2.2 Carbonization process
        2.3 Preparation of electrodes and electrochemical measurements
        2.4 Characterization
    3 Results and discussion
        3.1 Morphology and structure characterization of carbon materials
        3.2 Electrochemical characterization of carbon materials
    4 Conclusions
    Acknowledgements 
    References
저자
  • Yuxuan Liu(School of Chemical and Environmental Engineering, Hubei Minzu University)
  • Xinhua Cheng(School of Chemical and Environmental Engineering, Hubei Minzu University)
  • Shenghui Zhang(School of Chemical and Environmental Engineering, Hubei Minzu University)