Morphology and Electrical Capacity Properties of Nanostructured Composites PtM/Multi-Walled Carbon Nanotubes (M = Fe, Co)
YU. A. ZAKHAROV1, G. YU. SIMENYUK1, V. G. DODONOV2, N. V. IVANOVA2, A. A. LOBANOV2, T. O. TROSNYANSKAYA1, Z. R. ISMAGILOV1
1Federal Research Centre of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, Kemerovo, Russia
2Kemerovo State University, Kemerovo, Russia
Keywords: nanostructured composites, carbon nanotubes, bimetallic systems, supercapacitors, electrical capacitance
Pages: 443-452
Abstract
For the first time, nanocomposites based on non-ozonized and ozonized multi-walled carbon nanotubes (MWCNT) were obtained, with the outer and channel surfaces covered with nanosized crystallites of PtFe and PtCo bimetallic systems. The character of electrode Red-Ox processes taking place in a potential window from -1 to +1 V was established; electrochemical (energy storage) properties of nanocomposites in asymmetric two-electrode model cells of supercapacitors was studied. It was established that with an increase in the content of bimetallic phase up to 5 mass % in the composites, the electrode capacitance increases by a factor of 1.3-1.5 in comparison with initial nanotubes, which is explained by the formation of a pseudo-capacitive component due to the high-rate electrode Red-Ox processes involving intermetallic PtM.
DOI: 10.15372/CSD20202510
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