Chemical Research in Chinese Universities ›› 2018, Vol. 34 ›› Issue (6): 983-988.doi: 10.1007/s40242-018-8127-9

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Facile Self-templating Melting Route Preparation of Biomass-derived Hierarchical Porous Carbon for Advanced Supercapacitors

WANG Can1, WANG Dianyu1, ZHENG Shuang2, FANG Xueqing3, ZHANG Wenli1, TIAN Ye4, LIN Haibo1,5, LU Haiyan1,5, JIANG Lei4,6   

  1. 1. College of Chemistry, Jilin University, Changchun 130012, P. R. China;
    2. University of Chinese Academy of Sciences, Beijing 100049, P. R. China;
    3. School of Materials Science and Engineering, Tianjin University, Tianjin 300350, P. R. China
    4. Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, P. R. China;
    5. Guangdong Guanghua Sci-Tech Co., Ltd., Shantou 515061, P. R. China;
    6. School of Chemistry, Beihang University, Beijing 100190, P. R. China
  • Received:2018-04-18 Online:2018-12-01 Published:2018-08-23
  • Contact: LIN Haibo, LU Haiyan E-mail:lhb910@jlu.edu.cn;luhy@jlu.edu.cn
  • Supported by:
    Supported by the National Natural Science Foundation of China(Nos.21573093, 21671194) and the Guangdong Innovative and Entrepreneurial Research Team Program, China(No.2013C092).

Abstract: Biomass-derived porous carbons show great potential as electrode materials for supercapacitors due to the environmental friendliness. However, most of the carbonaceous electrode materials suffer from low specific capaci-tance and rate capacity because of the poor porosity. Here, we reported a simple and effective approach to prepare micro/nano-hierarchical structured carbon materials derived from rice husk by NaOH-KOH molten salt co-activation. The as-prepared activated carbons exhibit high porosity and suitable pore size distributions for more electrolyte ion adsorption, which are all beneficial for achieving remarkable electrochemical performances, such as high specific capacitance(194.6 F/g), excellent rate capability(retention of 85.9%) and outstanding cycling stability. Thus, the above biomass-derived carbon materials with high porosity and micro/nano structures obtained by co-activation method offered a new insight into novel electrode material for the use in energy storage systems with high energy density and excellent rate performance.

Key words: Porosity, co-Activation, Electrode material, Electrolyte, Supercapacitor