Hybrid Electrode Materials for Supercapacitors Based on Nanostructured Carbon Matrix Composites Filled with Chromium Oxides and Hydroxides
G. YU. SIMENYUK1, YU. A. ZAKHAROV1,2, V. M. PUGACHEV2, V. G. DODONOV2, T. O. TROSNYANSKAYA2, T. S. NECHAEVA1, L. V. ILKEVICH1, E. S. MIKHAILOVA1, and Z. R. ISMAGILOV1,3
1Institute of Coal Chemistry and Material Science, Federal Research Centre of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, Kemerovo, Russia
E-mail: galina-simenyuk@yandex.ru
2Kemerovo State University, Kemerovo, Russia
3Boreskov
Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
Keywords: nanocomposite, carbon matrixes, chromium oxides and hydroxides, electrode materials, supercapacitor
Abstract
Preparation methods of nanostructured composites based on various carbon materials filled with chromium oxides and hydroxides were developed via reduction of potassium dichromate with hydrazine. Materials with different parameters of the porous structure and specific surface, such as microporous Kem10 and mesoporous Carb3, and also carbon nanotubes (non-ozonised CNT-1 and ozonised CNT-2), were used as carbon matrixes. As demonstrated by research on asymmetrical cells of a supercapacitor with working electrodes based on the resulting nanocomposites via a set of electrochemical methods (cyclic voltammetry, chronopotentiometry, and impedansometry), surface decoration of matrixes with chromium oxides and hydroxides leads to an increase in capacitance and a decrease in the inner resistance of supercapacitor cells.
DOI: 10.15372/CSD20180607
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