Phase equilibriums,ion association,and mechanisms of solvation in the LiN(CF3SO2)2-(CH3)2SO2 system |
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| Authors: | M. M. Gafurov K. Sh. Rabadanov V. D. Prisyazhnyi D. O. Tret’yakov M. I. Gorobets S. A. Kirillov M. B. Ataev M. M. Kakagasanov |
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| Affiliation: | 1.Amirkhanov Institute of Physics and Analytical Center for Collective Use, Dagestan Scientific Center,Russian Academy of Sciences,Makhachkala,Russia;2.Inter-Agency Department of Electrochemical Energy Systems,National Academy of Sciences of Ukraine,Kiev,Ukraine;3.Institute for Sorption and Problems of Endoecology,National Academy of Sciences of Ukraine,Kiev,Ukraine |
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| Abstract: | The phase diagrams, isotherms of the electrical conductivity, Raman spectra, and time correlation functions of vibrational dephasing are studied for the LiN(CF3SO2)2-(CH3)2SO2 system, which is promising for use as an electrolyte in medium-temperature lithium-ion batteries. The phase diagram of this system contains a broad supercooled region. It is shown that the concentration dependences of the electrical conductivity are typical for solutions of strong electrolytes. The Raman spectra and the time correlation functions of vibrational dephasing for the anion and the solvent indicate that in the supercooling range, cations are weakly solvated by solvent molecules and form ion pairs. |
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