Investigation of the Structural Features and Capacitive Parameters of Carbon Materials Based on Carbonized Rice Husk
Z. A. MANSUROV1,2, A. P. NIKITIN3, G. YU. SIMENYUK3, YU. A. ZAKHAROV3, V. V. PAVLENKO1,2, Z. R. ISMAGILOV3
1Al-Farabi Kazakh National University, Almaty, Kazakhstan
2Institute of Combustion Problems, Almaty, Kazakhstan
3Federal Research Center of Coal and Coal Chemistry, Siberian Branch of the Russian Academy of Sciences, Kemerovo, Russia
Keywords: углеродные материалы, рисовая шелуха, карбонизация, электрохимические свойства, carbon materials, rice husks, carbonation, electrochemical properties
Pages: 394-402
Abstract
Porous carbon materials with a specific surface area of 1200-1500 m2/g were obtained by carbonization of rice husks at 500 °C, followed by subsequent activation using potassium hydroxide at a temperature of 700, 800, 900 °C, and studied by means of Raman spectroscopy and electrochemical methods. It was established that mechanical activation of rice husks makes it possible to increase the specific surface area (to 2315 m2/g) and the volume of micropores (to 0.84 cm3/g) in the carbon material. As a result, an increase in electrical capacity and a decrease in the internal resistance of supercapacitor cells with electrodes based on them are achieved.
DOI: 10.15372/CSD2020245
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