The electrochemical behaviour of 2-methyltetrahydrofuran solutions

Yosef Malik, Doron Aurbach, Pnina Dan, Arie Meitav

Research output: Contribution to journalArticlepeer-review

30 Scopus citations

Abstract

The electrochemical behaviour of 2-methyltetrahydrofuran (2Me-THF) solutions with lithium and noble metal electrodes was investigated. Surface-sensitive FTIR, X-ray microanalysis and scanning electron microscopy were applied in conjunction with electrochemical techniques in order to characterize the electrode surfaces in solutions and to correlate the cycling efficiency and surface morphology of lithium electrodes with their surface chemistry in solutions. The influence of a variety of contaminants, including oxygen, water, CO2, nitrogen, furans and paraffin oil, on the Li cycling efficiency, morphology and surface chemistry was also studied. It was found that the surface films formed on lithium in 2Me-THF contained several types of alkoxides. The presence of trace O2, water, CO2; and furans modifies the structure of these surface films and influences both the morphology and the Li cycling efficiency. The best efficiency of Li electrodes in charge-discharge cycling was obtained with uncontaminated LiAsF6 + 2Me-THF solutions.

Original languageEnglish
Pages (from-to)73-105
Number of pages33
JournalJournal of Electroanalytical Chemistry
Volume282
Issue number1-2
DOIs
StatePublished - 14 Oct 1990

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