Abstract
Effect of a preliminary electrolysis of electrolyte on the lithium electrode cyclability in a 1 M LiC1O4 solution in γ-butyrolactone is studied. On its repeated cycling in the same electrolyte, the lithium electrode’s efficiency decreases and the overvoltage of cathodic and anodic processes considerably increases. Soluble products of electrochemical destruction of the electrolytic system accumulate in solution during the lithium electrode cycling, the products being prone to polymerization. In the presence of these products, the lithium passivation rate increases and the cycling efficiency decreases significantly. It is concluded that the soluble products of the destruction are oligomers formed during electrochemical polymerization of γ-butyrolactone
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