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Electrochemical systems for galvanic cells in organic aprotic solvents: V. Electrochemical behaviour of gamma-butyrolactone
Authors:F.P. Dousek  J. Jansta
Affiliation:J. Heyrovský Institute of Physical Chemistry and Electrochemistry, Czechoslovak Academy of Sciences, 102 00-Prague 10 (Czechoslovakia)
Abstract:
Gamma-butyrolactone (GBL) was shown to decompose on the clean surface of Li, Na, K, and their amalgams. Polarization curves were obtained on Pt and “Kovar” electrodes at potentials from 4 to ?4 V vs. Li?Hg in 0.5 M LiClO4 or vs. K?Hg in 0.5 M KPF6. GBL was found to reduce electrochemically at potentials more positive than 1 V. Various passivation phenomena provoked by the decomposition of the solvent were observed, hindering cathodic deposition of the alkali metals from solutions of their salts in GBL. The presence of a high-molecular surfactant in the electrolyte suppresses the decomposition of GBL and suggests a path to the deposition of Li on the electrode.
Keywords:
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