ISSN 1608-4039 (Print)
ISSN 1680-9505 (Online)

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Leonova N. M., Leonova A. M., Bashirov O. A., Lebedev A. S., Trofimov A. A., Suzdal'tsev A. V. C/SiC-based anodes for lithium-ion current source. Electrochemical Energetics, 2023, vol. 23, iss. 1, pp. 41-50. DOI: 1608-4039-2023-23-1-41-50, EDN: ZFLYPF

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Language: 
Russian
Heading: 
Lithium electrochemical systems
Article type: 
Article
UDC: 
544.643
DOI: 
1608-4039-2023-23-1-41-50
EDN: 
ZFLYPF

C/SiC-based anodes for lithium-ion current source

Autors: 
Leonova Nataliya Maksimovna, Ural Federal University
Leonova Anastasiya Maksimovna, Ural Federal University
Bashirov Oleg Andreevich, Ural Federal University
Lebedev Aleksei Sergeevich, Institute of Mineralogy – a division of the the South Urals Federal Research Center of Mineralogy and Geo-ecology of the Urals Branch of the Russian Academy of Sciences
Trofimov Aleksei Alekseevich, Ural Federal University
Suzdal'tsev Andrei Viktorovich, Ural Federal University
Abstract: 

Compositions of ultrafine Si and C particles are promising anode materials for lithium-ion power sources with improved energy characteristics. In the work, samples of lithium-ion power sources with an anode made of ultrafine SiC fibers, as well as mixtures of SiC fibers with graphite (C/SiC) and electrolytically deposited submicron silicon fibers (C/Si/SiC) were fabricated and studied for energy characteristics. The working ability of the mixtures obtained during lithiation/delithiation was shown, and the main energy characteristics of the investigated anode half-cells were determined. After 100 cycles, the SiC anode reached a discharge capacity of 180 and 138 mA⋅h/g at a charge current of C/20 and C, respectively. Anodes made of mixtures (wt%) 29.5C-70.5SiC and 50Si-14.5C-35.5SiC show discharge capacities of 328 and 400 mA⋅h/g at a charge current of C/2. The Coulomb efficiency of all samples was above 99%.

Key words: 
lithium-ion power sources
silicon carbide
electrodeposited silicon
lithiation
discharge capacity
Coulomb efficiency
Acknowledgments: 
The work was carried out within the framework of the state task of the Ministry of Education and Science of the Russian Federation (Agreement No. 075-03-2022-011 dated January 14, 2022, FEUZ-2020-0037).
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Received: 
20.01.2023
Accepted: 
15.03.2023
Published: 
31.03.2023