Chinese Journal of Applied Chemistry ›› 2019, Vol. 36 ›› Issue (4): 482-488.DOI: 10.11944/j.issn.1000-0518.2019.04.180294

• Full Papers • Previous Articles    

Synthesis of Sodium Chloride Induced Lignin-Based Porous Carbon and Their Supercapacitor Performances

XIE Yaqiaoa,ZHAO Jiaxina,LI Jielana,XU Zidia,QU Jiangyingab,TIAN Yunqia,GAO Fengab*()   

  1. aFaculty of Chemistry and Chemical Engineering,Liaoning Normal University,Dalian,Liaoning 116029,China
    bSchool of Environment and Civil Engineering,Dongguan University of Technology,Dongguan,Guangdong 523808,China
  • Received:2018-09-07 Accepted:2018-11-29 Published:2019-04-01 Online:2019-04-02
  • Contact: GAO Feng
  • Supported by:
    Supported by the National Natural Science Foundation of China(No.U1610114), Natural Science Fund of Liaoning Province(No.201602458), Doctoral Scientific Research Foundation of Liaoning Province(No.201601240)

Abstract:

A novel class of lignin-based porous carbon(PC) for supercapacitor electrode was successfully fabricated using lignin as the carbon precursor and NaCl as the template by reflux at low temperature and calcination at high temperature. The results indicate that the porous structures of the obtained samples can be regulated by varying the calcination temperature, where the surface area and pore volume of samples firstly increases then decreases with the increase of the temperature. As a result, the specific surface area of the obtained sample can be tailored in the range of 548~600 m2/g. PC calcinated at 700 ℃ has the largest surface area and exhibits the highest specific capacitance of 252 F/g and an effective areal capacitance of 31.2 μF/cm2 in 6 mol/L KOH solution. NaCl template can be cycled by washing from the products. This paper proposes a green method for synthesis of high value-added porous carbon from waste materials.

Key words: porous carbon, lignin, salt template, supercapacitor