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Chemistry for Sustainable Development

2017 year, number 6

Nanostructured composites "porous carbon matrices - products of thermolysis Co(N3)2"

Y. A. ZAKHAROV1,2, N. M. FEDOROVA2, G. Y. SIMENIUK1, V. M. PUGACHEV2, V. G. DODONOV2
1Institute of Coal Chemistry and Chemical Materials Science, Siberian Branch of the Russian Academy of Sciences, Kemerovo, Russia
2Kemerovo State University, Kemerovo, Russia
Keywords: кобальт, азид кобальта, углеродная матрица, наноструктурированный композит
Pages: 558-563

Abstract

The properties of nanostructured composites based on porous carbon matrices filled with products of thermolysis of cobalt azide particles pre-synthesized in pores of matrices are considered. Porous carbon materials of the types "Carbonisation 3" and "Kemerite 8" were used as matrices. The investigations were performed by X-ray diffraction, X-ray fluorescence analysis and small-angle X-ray scattering. According to X-ray diffractometry data, the Co (N3) 2 decomposition products in the explosive mode on the "Carbonisate 3" matrix are metallic cobalt and CoO, and on the "Kemerite 8" matrix the main product of thermal decomposition is the spinel Co3O4. The study of matrices and composites based on "Carbonizate 3" by the MCPD method has shown that the sizes of the three detectable groups of inhomogeneities observed on carbon matrices during the preparation of the composite range from 1-3, 6-18, and 160-300 nm. The electrochemical properties of the obtained nanocomposite material were studied. It is shown that the introduction of cobalt oxide into the carbon matrix leads to an increase in resistance and an increase in the electrical capacity of the composite electrodes. The increase in capacity is due to the pseudo-capacity of cobalt oxides due to reversible oxidation-reduction processes involving the oxide-hydroxide phases of cobalt, which are formed during the charge-discharge of the cell.

DOI: 10.15372/CSD20170604