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Chemistry and Industry of Forest Products ›› 2021, Vol. 41 ›› Issue (6): 43-50.doi: 10.3969/j.issn.0253-2417.2021.06.006

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Preparation of Boron and Nitrogen Co-doped Porous Carbon Derived from Sword Bean Shell and Its Electrochemical Performance

Lu LUO1, Lingcong LUO1, Jianping DENG1, Tingting CHEN1, Mizi FAN1,2, Guanben DU3, Weigang ZHAO1,*()   

  1. 1. College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350018, China
    2. College of Engineering, Design and Physical Sciences, Brunel University, London UB8 3PH, United Kingdom
    3. College of Material Science and Engineering, Southwest Forestry University, Kunming 650224, China
  • Received:2020-09-04 Online:2021-12-28 Published:2021-12-31
  • Contact: Weigang ZHAO E-mail:weigang-zhao@fafu.edu.cn


The high surface area activated carbon was produced firstly by a simple two-step process of carbonization and KOH activation using forestry and agricultural residues sword bean shells as precursor. Furthermore, the N and B co-doped hierarchical porous carbon was prepared by hydrothermal post-treatment process using ammonium pentaborate tetrahydrate(NH4B5O8·4H2O) as nitrogen and boron source. The scanning electron microscopy, transmission electron microscopy, nitrogen adsorption/desorption isotherm and inductive coupled plasma emission spectrometer were used to investigate the morphological, structural and chemical properties. Meanwhile, the electrochemical performance was tested by a three-electrode system. The results showed that the maximum specific surface area, total pore volume, and micropore volume of the doped activated carbons could reach 2 859 m2/g, 1.34 cm3/g, and 0.99 cm3/g, respectively. The boron and nitrogen contents were 3.27% and 2.60%. The B and N co-doped activated carbon materials possessed excellent rate performance. Due to the synergistic effect of heteroatoms doping and also appropriate texture properties, the maximum specific capacitances were 369 and 240 F/g at the current density of 1 and 20 A/g, respectively.

Key words: sword bean shell, ammonium pentaborate tetrahydrate, activated carbon, specific surface area, micropore volume

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