Electrochemical Behaviour of Commercial and Modified Activated Carbons in Aqueous Supercapacitors
Temirkulova K.M. Temirbolat S. Supiyeva Z.A. Abbas Q.
17 October 2025Institute of Combustion Problems, al-Farabi Kazakh State National University
Eurasian Chemico-Technological Journal
2025#27Issue 3159 - 171 pp.
Supercapacitors offer high specific power, short charge-discharge times, and long cycle life. This study presents a comparative analysis of the electrochemical performance of commercial activated carbon Kuraray YP80F and its modified analogue YP80FP, which was subjected to thermal treatment. High-temperature treatment of YP80FP led to changes in porosity and a reduction in electrochemical activity. Electrochemical studies were carried out using cyclic voltammetry, galvanostatic charge-discharge, electrochemical impedance spectroscopy, and self-discharge methods. The results show that YP80F exhibits higher specific capacitance and lower internal resistance owing to its well-developed microporous structure. The optimum operating voltage range was determined to be between 0.6–1.5 V, with YP80F showing the best performance for an aqueous sodium nitrate electrolyte. The results demonstrate that heat treatment of activated carbon may lead to the development of surface functional groups and the blocking of pores, affecting overall supercapacitor performance in aqueous electrolytes.
Activated carbon , Cycling resistance , Heat treatment , Porous structure , Supercapacitors
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Satbayev University, 22a Satpaev Str., Almaty, 050013, Kazakhstan
Al-Farabi Kazakh National University, 71 Al-Farabi Ave., Almaty, 050040, Kazakhstan
Graz University of Technology, Stremayrgasse 9, Graz, 8010, Austria
Poznan University of Technology, Berdychowo 4, Poznań, 60-965, Poland
Satbayev University
Al-Farabi Kazakh National University
Graz University of Technology
Poznan University of Technology
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