Influence of Fluoroethylene Carbonate in the Composition of an Aprotic Electrolyte on the Electrochemical Characteristics of LIB’s Anodes Based on Carbonized Nanosilicon

Here, we study an effect of FEC addition to TC-E918 electrolyte on the electrochemical performance of Si/C negative electrodes. The anodes were fabricated from nanosilicon powder coated with a carbon shell by means of a standard slurry technique. The low-temperature reduction of fluorocarbon on the...

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Bibliographic Details
Published in:Batteries (Basel) 2022-08, Vol.8 (8), p.91
Main Authors: Parfeneva, Alesya V., Rumyantsev, Aleksander M., Lozhkina, Darina A., Maximov, Maxim Yu, Astrova, Ekaterina V.
Format: Article
Language:English
Subjects:
Additives
Anodes
Carbon
Carbonates
carbonization
Composition
Design and construction
Efficiency
Electrochemical analysis
electrochemical impedance spectroscopy
Electrodes
Electrolytes
Fluorocarbons
fluoroethylene carbonate
Graphite
lithium-ion batteries
Low temperature
Materials
Nanoparticles
Perfluorocarbons
Si/C anodes
Silicon
Spectrum analysis
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Summary:Here, we study an effect of FEC addition to TC-E918 electrolyte on the electrochemical performance of Si/C negative electrodes. The anodes were fabricated from nanosilicon powder coated with a carbon shell by means of a standard slurry technique. The low-temperature reduction of fluorocarbon on the surface of Si nanoparticles was used to form the shell. It was shown that the presence of FEC in the electrolyte increases the cyclic stability of the electrodes and maintains a 1.5-fold higher discharge capacity during 300 cycles. Impedance measurements were used to study changes in the electrode parameters during long-term cycling with and without FEC additives.
ISSN:2313-0105
2313-0105
DOI:10.3390/batteries8080091