SYNTHESIS AND CHARACTERIZATION OF ELECTRODE MATERIALS FOR SUPERCAPACITOR SYSTEMS

B. Mladenova1*, B. Karamanova¹, S. Veleva¹, T. Stankulov¹, V. Ilcheva¹, A. Stoyanova¹

¹ Institute of Electrochemistry аnd Energy Systems, Bulgarian Academy of Sciences, Acad. G. Bonchev Str, 10, 1113 Sofia, Bulgaria

*e-mail: borislava.mladenova@iees.bas.bg

Abstract: The current investigation presents some results of the syn-thesis of carbon xerogels and MnO₂ - based materials with predefined phase composition and surface for potential application as electrodes in su-percapacitors. Carbon materials were prepared by polycondensation of res-orcinol and formaldehyde. Two different methods were used for heat treat-ment of the previously obtained solution: microwave heating and thermal treatment in vacuum. The obtained materials are subsequently carbonized and activated in order to increase their specific surface. MnO₂-based mate-rials were synthesized by chemical reduction in aqueous solution and hydro-thermal synthesis. All synthesized samples were structurally and morpho-logically characterized. The results of the current analyzes demonstrate differences in the phase composition and structure of the obtained materi-als, reflecting on their surface properties. This creates prerequisites for in-depth study of the influence of the synthesis method, which will reflect on the electrochemical characteristics of the studied and the further tested su-percapacitors.

Acknowledgments: This research is supported by the award № DO1-286 / 07.10.2020 granted from by the Ministry of Education and Science of Bulgaria. Authors gratefully acknowledge.

Keywords: carbon xerogels, MnO₂, electrode materials, supercapaci-tors

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