@article{Pavlenko_Abbas_Przygocki_Kon’kova_Supiyeva_Abeykoon_Prikhodko_Bijsenbayev_Kurbatov_Lesbayev_et al._2018, title={Temperature Dependent Characteristics of Activated Carbons from Walnut Shells for Improved Supercapacitor Performance}, volume={20}, url={https://ect-journal.kz/index.php/ectj/article/view/695}, DOI={10.18321/ectj695}, abstractNote={<p>Activated carbons (ACs) have been prepared from chemical treatment of walnut shells (WS) precursor at various temperatures (400‒800 °C) by using phosphoric acid (H<sub>3</sub>PO<sub>4</sub>) 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 m<sup>2</sup> g<sup>-1</sup> and a total pore volume up to 1.3 cm<sup>3</sup> g<sup>-1</sup>. Carbon material obtained through activation by H<sub>3</sub>PO<sub>4</sub> 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<sup>-1</sup> Li<sub>2</sub>SO<sub>4</sub>. The electrochemical capacitor demonstrated high capacitance of 123 F g<sup>-1</sup> per mass of one electrode, reduced cell resistance and stable capacitance for 5000 galvanostatic charge/discharge cycles at 1.0 A g<sup>-1</sup>.</p> <p> </p>}, number={2}, journal={Eurasian Chemico-Technological Journal}, author={Pavlenko, V. V. and Abbas, Q. and Przygocki, P. and Kon’kova, T. and Supiyeva, Zh. and Abeykoon, N. and Prikhodko, N. and Bijsenbayev, M. and Kurbatov, A. and Lesbayev, B.T. and et al.}, year={2018}, month={May}, pages={99–105} }