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Preparation and Electrochemical Performance of Bio-Oil-Derived Hydrochar as a Supercapacitor Electrode Material

Author

Listed:
  • Juntao Wei

    (Joint International Research Laboratory of Biomass Energy and Materials, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China)

  • Jiawei Sun

    (Joint International Research Laboratory of Biomass Energy and Materials, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China)

  • Deliang Xu

    (Joint International Research Laboratory of Biomass Energy and Materials, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China)

  • Lei Shi

    (Joint International Research Laboratory of Biomass Energy and Materials, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China)

  • Miao Wang

    (Joint International Research Laboratory of Biomass Energy and Materials, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China)

  • Bin Li

    (School of Energy and Power Engineering, Jiangsu University, Zhenjiang 212013, China)

  • Xudong Song

    (State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan 750021, China)

  • Shu Zhang

    (Joint International Research Laboratory of Biomass Energy and Materials, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China)

  • Hong Zhang

    (Joint International Research Laboratory of Biomass Energy and Materials, Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China)

Abstract

The rapid consumption of fossil energy and the urgent demand for sustainable development have significantly promoted worldwide efforts to explore new technology for energy conversion and storage. Carbon-based supercapacitors have received increasing attention. The use of biomass and waste as a carbon precursor is environmentally friendly and economical. In this study, hydrothermal pretreatment was used to synthetize coke from bio-oil, which can create a honeycomb-like structure that is advantageous for electrolyte transport. Furthermore, hydrothermal pretreatment, which is low in temperature, can create a low graphitization degree which can make heteroatom introduction and activation easier. Then, urea and KOH were used for doping and activation, which can improve conductivity and capacitance. Compared with no heteroatom and activation hydrothermal char (HC) (58.3 F/g at 1 A/g), the prepared carbon material nitrogen doping activated hydrothermal carbon (NAHC 1 ) had a good electrochemical performance of 225.4 F/g at 1 A/g. The specific capacitance of the prepared NAHC 1 was improved by 3.8 times compared with that of HC.

Suggested Citation

  • Juntao Wei & Jiawei Sun & Deliang Xu & Lei Shi & Miao Wang & Bin Li & Xudong Song & Shu Zhang & Hong Zhang, 2023. "Preparation and Electrochemical Performance of Bio-Oil-Derived Hydrochar as a Supercapacitor Electrode Material," IJERPH, MDPI, vol. 20(2), pages 1-12, January.
    • Handle: RePEc:gam:jijerp:v:20:y:2023:i:2:p:1355-:d:1032716
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    References listed on IDEAS

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    1. Gou, Guangjun & Huang, Fei & Jiang, Man & Li, Jinyang & Zhou, Zuowan, 2020. "Hierarchical porous carbon electrode materials for supercapacitor developed from wheat straw cellulosic foam," Renewable Energy, Elsevier, vol. 149(C), pages 208-216.
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