, Volume 25, Issue 7, pp 3299–3307 | Cite as

A hydrothermal carbonization process for the preparation of activated carbons from hemp straw: an efficient electrode material for supercapacitor application

  • Xia Jiang
  • Gaofeng ShiEmail author
  • Guoying Wang
  • Puranjan Mishra
  • Chao Liu
  • Yucan Dong
  • Peng Zhang
  • Haoqi Tian
  • Yanrong Liu
  • Zhao Wang
  • Qi Zhang
  • Hongquan Zhang
Original Paper


In the present study, a hemp straw activated carbon (HSAC) was simply prepared by hydrothermal process followed by a pre-oxidization and carbonization by KOH solid-state activation. The as-synthesized HSAC shows abundant porosity, which is designed to be beneficial to the fast transportation of electrolyte. The preparation conditions for HSACs under different mass ratios of KOH:precursors were optimized, and the sample obtained by a mass ratio of 4:1 showed an outstanding capacitive property (specific capacitance of 279 F g−1 at 0.5 A g−1 current density). Besides, the capacitance of 91.6% was retained after 5000 charge-discharge cycles under 2 A g−1 current density. The resulting symmetrical supercapacitor obtained by using the HSAC electrodes exhibited an excellent electrochemical performance, which successfully illuminated a LED light. The HSAC has great potentials as electrode material for high-performance supercapacitor, which opens a new way for value increment of natural products.


Hydrothermal method Hemp straw Activated carbons Electrode material Supercapacitor 


Funding information

This work was supported by the National Key Research and Development Program of China (2016YFC0202900), National Natural Science Foundation of China (21567015), Natural Science Foundation of Gansu Province (17JR5RA109), and Gansu Provincial Party Committee Young Creative Talents (Ganzutongzi, 2017/121).


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  • Xia Jiang
    • 1
    • 2
  • Gaofeng Shi
    • 1
    Email author
  • Guoying Wang
    • 1
  • Puranjan Mishra
    • 3
  • Chao Liu
    • 1
  • Yucan Dong
    • 1
  • Peng Zhang
    • 1
  • Haoqi Tian
    • 1
  • Yanrong Liu
    • 1
  • Zhao Wang
    • 1
  • Qi Zhang
    • 1
  • Hongquan Zhang
    • 1
  1. 1.School of Petrochemical EngineeringLanzhou University of TechnologyLanzhou cityChina
  2. 2.Gansu Vocational College of AgricultureLanzhou cityChina
  3. 3.Faculty of Engineering TechnologyUniversiti Malaysia PahangKuantanMalaysia

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