Electrode Material for Supercapacitors Based on Carbon/Nickel Cobaltate Nanocomposite Synthesized by the Thermal Decomposition of Cobalt and Nickel Azides
T. A. LARICHEV1, N. M. FEDOROVA1, G. YU. SIMENYUK2, YU. A. ZAKHAROV1,2, V. M. PUGACHEV1, V. G. DODONOV1, D. G. YAKUBIK1
1Kemerovo State University, Kemerovo, Russia
2Federal Research Center for Coal and Coal Chemistry, Siberian Branch of the Russian Academy of Sciences, Kemerovo, Russia
Keywords: кобальтат никеля, оксид кобальта, азид кобальта, азид никеля, углеродные нанотрубки, суперконденсаторы, nickel cobaltate, cobalt oxide, cobalt azide, nickel azide, carbon nanotube, supercapacitor
Pages: 610-617
Abstract
Structural, morphological and electrochemical properties of the electrode material for supercapacitors which consists of a porous matrix with embedded mixed cobalt-nickel oxide nanoparticles were investigated. The synthesis of nanostructured composite was carried out by thermal decomposition of mixed nickel and cobalt azides on the surface of multi-wall carbon nanotubes. X-ray diffraction analysis and small-angle scattering were used to determine the composition and to estimate the dispersion characteristics of the obtained oxide nanoparticles. Investigation of the electrochemical properties of synthesized electrode materials by means of cyclic voltammetry showed that the growth of their electrical capacity is proportional to an increase in the content of nickel cobaltate NiCo2O4 in the composite, while the dependence for cobalt oxide Co3O4 is more complicated. Electrode materials based on nanostructured carbon - nickel cobaltate composite С/NiCo2O4 provide a significant increase in electrical capacity, compared to the capacity of the original carbon matrix.
DOI: 10.15372/CSD2019181
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