Influence of Fluoroethylene Carbonate in the Composition of an Aprotic Electrolyte on the Electrochemical Characteristics of LIB’s Anodes Based on Carbonized Nanosilicon
Alesya V. Parfeneva,
Aleksander M. Rumyantsev,
Darina A. Lozhkina,
Maxim Yu. Maximov,
Ekaterina V. Astrova
Affiliations
Alesya V. Parfeneva
Ioffe Institute, Russian Academy of Sciences, Politekhnicheskaya St. 26, 194021 Saint Petersburg, Russia
Aleksander M. Rumyantsev
Ioffe Institute, Russian Academy of Sciences, Politekhnicheskaya St. 26, 194021 Saint Petersburg, Russia
Darina A. Lozhkina
Ioffe Institute, Russian Academy of Sciences, Politekhnicheskaya St. 26, 194021 Saint Petersburg, Russia
Maxim Yu. Maximov
Institute of Machinery, Materials and Transport, Peter the Great Saint-Petersburg Polytechnic University, Politekhnicheskaya St. 29, 195251 Saint Petersburg, Russia
Ekaterina V. Astrova
Ioffe Institute, Russian Academy of Sciences, Politekhnicheskaya St. 26, 194021 Saint Petersburg, Russia
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.
