Abstract
Processes that occur on the lithium electrode under open-circuit conditions and when polarized cathodically and anodically are studied by means of the electrochemical-noise method. The study is carried out in such aprotic organic electrolytes as 1 M solution of LiClO4 in 1,3-dioxolane; 1 M solution of LiPF6 in a mixture of ethylene carbonate and diethyl carbonate; and 1 M solution of LiN(CF3SO2)2 in 1,3-dioxolane. An analysis of the noise characteristics of the polarized electrode confirms that the electrochemical process is localized under the passivating film. Potential fluctuations of the electrode polarized at high current densities depend on the electrolyte nature. The amplitude of the electrochemical noise is maximum in the electrolyte system 1 M LiPF6 in a mixture of ethylene carbonate and diethyl carbonate. The fluctuation intensity is found to correlate with the electrode stability when cycled. This fact suggests that the method can be used for express assessment of organic electrolytes intended for lithium batteries.
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Translated from Elektrokhimiya, Vol. 41, No. 10, 2005, pp. 1226–1233.
Original Russian Text Copyright © 2005 by Kanevskii, Grafov, Astaf'ev.
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Kanevskii, L.S., Grafov, B.M. & Astaf'ev, M.G. Dynamics of Electrochemical Noise of the Lithium Electrode in Aprotic Organic Electrolytes. Russ J Electrochem 41, 1091–1096 (2005). https://doi.org/10.1007/s11175-005-0186-9
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DOI: https://doi.org/10.1007/s11175-005-0186-9