Temperature Dependent Characteristics of Activated Carbons from Walnut Shells for Improved Supercapacitor Performance

Authors

  • V. V. Pavlenko Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland; al-Farabi Kazakh National University, 71 al-Farabi Ave., 050040 Almaty, Kazakhstan; Institute of Combustion Problems, Bogenbay Batyr str. 172, 050012 Almaty, Kazakhstan
  • Q. Abbas Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland
  • P. Przygocki Poznan University of Technology, Berdychowo 4, 60-965 Poznan, Poland
  • T. Kon’kova D. Mendeleev University of Chemical Technology of Russia, Miusskaya sq., 9, 125047 Moscow, Russia
  • Zh. Supiyeva Al-Farabi Kazakh National University, 71 al-Farabi Ave., 050040 Almaty, Kazakhstan
  • N. Abeykoon University of Texas at Dallas, 800 W Campbell Rd, 75080-3021 Richardson, USA
  • N. Prikhodko Institute of Combustion Problems, Bogenbay Batyr str. 172, 050012 Almaty, Kazakhstan; Almaty University of Energetics and Communications, 126, Baytursinova St., 050013, Almaty, Kazakhstan
  • M. Bijsenbayev Institute of Combustion Problems, Bogenbay Batyr str. 172, 050012 Almaty, Kazakhstan
  • A. Kurbatov Al-Farabi Kazakh National University, 71 al-Farabi Ave., 050040 Almaty, Kazakhstan
  • B.T. Lesbayev Al-Farabi Kazakh National University, 71 al-Farabi Ave., 050040 Almaty, Kazakhstan; Institute of Combustion Problems, Bogenbay Batyr str. 172, 050012 Almaty, Kazakhstan
  • Z. A. Mansurov Institute of Combustion Problems, Bogenbay Batyr str. 172, 050012 Almaty, Kazakhstan

DOI:

https://doi.org/10.18321/ectj695

Keywords:

activated carbon, walnut shells, phosphoric acid activation, thermal post-treatment, electrochemical capacitor

Abstract

Activated carbons (ACs) have been prepared from chemical treatment of walnut shells (WS) precursor at various temperatures (400‒800 °C) by using phosphoric acid (H3PO4) as activating agent. Influence of activation temperature on the porosity development and capacitive properties of resulting carbons was investigated. Thermal post-treatment of carbons previously activated at moderate temperature, e.g. 400 °C allowed further structural and porosity modification. Then, these carbons were investigated by scanning electron microscopy, Raman spectroscopy, energydispersive X-ray spectroscopy, electrochemical techniques and low temperature nitrogen adsorption exhibiting high BET specific surface area of approximately 2100 m2 g-1 and a total pore volume up to 1.3 cm3 g-1. Carbon material obtained through activation by H3PO4 at 400 °C and post-treated at 800 °C was used to make electrodes which were implemented to realize AC/AC capacitor using 1 mol L-1 Li2SO4. The electrochemical capacitor demonstrated high capacitance of 123 F g-1 per mass of one electrode, reduced cell resistance and stable capacitance for 5000 galvanostatic charge/discharge cycles at 1.0 A g-1.

 

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Published

30-05-2018

How to Cite

Pavlenko, V. V., Abbas, Q., Przygocki, P., Kon’kova, T., Supiyeva, Z., Abeykoon, N., … Mansurov, Z. A. (2018). Temperature Dependent Characteristics of Activated Carbons from Walnut Shells for Improved Supercapacitor Performance. Eurasian Chemico-Technological Journal, 20(2), 99–105. https://doi.org/10.18321/ectj695

Issue

Vol. 20 No. 2 (2018)

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Articles

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