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 named after the first President of Russia B. N. Yeltsin
Leonova Anastasiya Maksimovna, Ural Federal University named after the first President of Russia B. N. Yeltsin
Bashirov Oleg Andreevich, Ural Federal University named after the first President of Russia B. N. Yeltsin
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 named after the first President of Russia B. N. Yeltsin
Suzdal'tsev Andrei Viktorovich, Ural Federal University named after the first President of Russia B. N. Yeltsin
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