Synthesis of a Carbon/NiCo2O4 Electrode Material for a Supercapacitor by Thermal Decomposition of Mixed Cobalt–Nickel Hydroxides
T. A. LARICHEV1, N. M. FEDOROVA1, YU. A. ZAKHAROV1,2, G. YU. SIMENYUK2, V. M. PUGACHEV1, V. G. DODONOV1, E. V. KACHINA1, and E. S. MIHAILOVA2
1Kemerovo State University, Kemerovo, Russia
E-mail: timlar@kemsu.ru
2Institute of Coal Chemistry and Material Sciences of the Federal Research Centre of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, Kemerovo, Russia
Keywords: cobalt, cobalt oxides, porous carbon, nanostructured composites, supercapasitors
Abstract
The paper presents the research results of structural-morphological and electrochemical properties of an electrode material for supercapacitors. The material is a porous carbon matrix with embedded mixed cobalt-nickel oxide nanoparticles. A nanostructured composite was produced by thermal decomposition of mixed nickel-cobalt hydroxides on the surface of carbon nanofibres. The composition and dispersion characteristics of the resulting oxide nanoparticles were determined through X-ray structural analysis and small-angle scattering. As demonstrated by the research on electrochemical properties of the synthesized electrode materials through cyclic voltammetry, the electric capacitance of the latter increased proportionally to an increase in the content of nickel cobaltate in the composite. Electrode materials based on nanostructured carbon-nickel cobaltate composite ensured a significant increase in electric capacitance compared to that of the initial carbon matrix.
DOI: 10.15372/CSD20180608
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