能源化学(英文版) ›› 2019, Vol. 39 ›› Issue (12): 1-7.

• •    下一篇

Microwave-assisted conversion of biomass wastes to pseudocapacitive mesoporous carbon for high-performance supercapacitor

Xiangkun Boa, Kun Xianga, Yu Zhanga, Yu Shena, Shanyong Chena, Yongzheng Wanga, Mingjiang Xieb, Xuefeng Guoa   

  1. a Key Lab of Mesoscopic Chemistry MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, Jiangsu, China;
    b Hubei Key Laboratory for Processing and Application of Catalytic Materials, Huanggang Normal University, Huanggang 438000, Hubei, China
  • 收稿日期:2018-10-17 修回日期:2018-12-29 出版日期:2019-12-15 发布日期:2020-12-18
  • 通讯作者: Mingjiang Xie, xiemingjiang@hotmail.com; Xuefeng Guo, guoxf@nju.edu.cn
  • 基金资助:
    This work was financially supported by the National Key Technology R&D Program of China (2017YFB0310704), the National Natural Science Foundation of China (21773112 and 21173119) and the Fundamental Research Funds for the Central Universities.

Microwave-assisted conversion of biomass wastes to pseudocapacitive mesoporous carbon for high-performance supercapacitor

Xiangkun Boa, Kun Xianga, Yu Zhanga, Yu Shena, Shanyong Chena, Yongzheng Wanga, Mingjiang Xieb, Xuefeng Guoa   

  1. a Key Lab of Mesoscopic Chemistry MOE, School of Chemistry and Chemical Engineering, Nanjing University, Nanjing 210023, Jiangsu, China;
    b Hubei Key Laboratory for Processing and Application of Catalytic Materials, Huanggang Normal University, Huanggang 438000, Hubei, China
  • Received:2018-10-17 Revised:2018-12-29 Online:2019-12-15 Published:2020-12-18
  • Contact: Mingjiang Xie, xiemingjiang@hotmail.com; Xuefeng Guo, guoxf@nju.edu.cn
  • Supported by:
    This work was financially supported by the National Key Technology R&D Program of China (2017YFB0310704), the National Natural Science Foundation of China (21773112 and 21173119) and the Fundamental Research Funds for the Central Universities.

摘要: Developing an efficient approach of transforming biomass waste to functional carbon-based electrode materials applied in supercapacitor offers an important and high value-added practical application due to the abundance and considerable low price of biomass wastes. Herein, a hierarchical carbon functionalized with electrochemical-active oxygen-containing groups was fabricated by microwave treatment from the biomass waste of camellia oleifera. The obtained mesoporous carbon (MAC) owns nanosheet morphology, rich mesoporosity, large surface area (1726 m2/g) and very high oxygenic functionalities (16.2 wt%) with pseudocapacitive activity. Prepared electrode of supercapacitor and tested in 2.0 M H2SO4, the MAC exhibits an obvious pseudocapacitive activity and achieved a superior supercapacitive performance to that of directly activated carbon (DAC-800) including high specific capacitance (367 F/g vs. 298 F/g) and better rate performance (66% vs. 44%). The symmetrical supercapacitor based on MAC shows a high capacity of 275 F/g, large energy density of 9.55 Wh/kg (at power density of 478 W/kg) and excellent cycling stability with 99% capacitance retention after 10000 continuous charge-discharge, endowing the obtained MAC a promising functional material for electrochemical energy storage.

关键词: Microwave conversion, Mesoporous carbon, Pseudocapacitive activity, Supercapacitor

Abstract: Developing an efficient approach of transforming biomass waste to functional carbon-based electrode materials applied in supercapacitor offers an important and high value-added practical application due to the abundance and considerable low price of biomass wastes. Herein, a hierarchical carbon functionalized with electrochemical-active oxygen-containing groups was fabricated by microwave treatment from the biomass waste of camellia oleifera. The obtained mesoporous carbon (MAC) owns nanosheet morphology, rich mesoporosity, large surface area (1726 m2/g) and very high oxygenic functionalities (16.2 wt%) with pseudocapacitive activity. Prepared electrode of supercapacitor and tested in 2.0 M H2SO4, the MAC exhibits an obvious pseudocapacitive activity and achieved a superior supercapacitive performance to that of directly activated carbon (DAC-800) including high specific capacitance (367 F/g vs. 298 F/g) and better rate performance (66% vs. 44%). The symmetrical supercapacitor based on MAC shows a high capacity of 275 F/g, large energy density of 9.55 Wh/kg (at power density of 478 W/kg) and excellent cycling stability with 99% capacitance retention after 10000 continuous charge-discharge, endowing the obtained MAC a promising functional material for electrochemical energy storage.

Key words: Microwave conversion, Mesoporous carbon, Pseudocapacitive activity, Supercapacitor