Authors: Yu.A. Zakharov, G.Yu. Simenyuk, V.G. Dodonov, N.S. Zakharov, I.Yu. Zykov, N.I. Fedorova, T.O. Sergina, D.G. Yakubik

Title of the article: Analysis of the supra-atomical structure of the c-matrix obtained from anthracite of the Kiyzasskiy section by the method of small-angle x-ray scattering

Year: 2024, Issue: 6, Pages: 58-67

Branch of knowledge: 2.6.12. Chemical technology of fuel and high-energy substances

Index UDK: 661.666.1

DOI: 10.26730/1999-4125-2024-6-58-67

Abstract: The paper shows that the most important stage in the creation of carbon-matrix composites, such as supercapacitors, is the selection of a carbon substrate, which must meet a number of very high requirements that cannot be achieved without using modern physical and chemical research methods, which determines the relevance of the work. The carbon matrix obtained by high-temperature (800°C) alkaline (KOH) activation of anthracite from the Kiyzassky section in the Kuznetsk Basin was studied using small-angle X-ray scattering, CHNOS analysis, and IR spectroscopy. Using the methods of CHNOS analysis and IR spectroscopy, it was shown that the studied carbon matrix contains oxygen-containing functional groups (–OH, –C–O–, C=O), which can participate in Red-Ox reactions during the formation of nanothick films and anisometric crystals of fillers such as mixed manganese oxides (Mn_xO_y) or cobalt (Co_xO_y) on its surface, as well as nanoparticles of noble metals such as silver, gold or platinum. When analyzing the data obtained by the small-angle X-ray scattering method, it was established that the studied carbon matrix has a developed system of pores (channels). Analysis of experimental curves of small-angle X-ray scattering and further construction on their basis of mass functions of distributions of inhomogeneities by sizes allowed to distinguish different types of inhomogeneities: 2–2,5 nm, 5–9 nm, as well as 12–16 nm, and the most significant part of inhomogeneities with sizes of 170–400 nm. When comparing complementary experimental data in the work, a conclusion was made about the prospects of using the selected C-matrix in creating carbon-matrix composites on its basis for their application in nano-(micro)electronics, as well as the significant role of small-angle X-ray scattering in its characterization.

Key words: small-angle X-ray scattering carbon materials supercapacitors nanostructured composites anthracite alkaline activation

Receiving date: 13.08.2024

Approval date: 22.11.2024

Publication date: 05.12.2024

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