The electrode potentials of the Group i alkali metals in the ionic liquid N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide

Rahmat Wibowo, Leigh Aldous, Sarah E.Ward Jones, Richard G. Compton

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21 Citations (Scopus)

Abstract

The redox couples M/M+ of the Group I alkali metals Lithium, Sodium, Potassium, Rubidium and Caesium have been extensively investigated in a room temperature ionic liquid (IL) and compared for the first time. Cyclic voltammetric experiments in the IL N-butyl-N-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide ([C4mpyrr][NTf2]) and subsequent simulation of the data has allowed the determination of the formal potential (Ef0 vs. ferrocene/ferrocenium), standard electrochemical rate constant (k) and transfer coefficient (α) for each couple in the group. The trend in Ef0 in [C4mpyrr][NTf2] is remarkably similar to the established trend in the common battery electrolyte, propylene carbonate.

Original languageEnglish
Pages (from-to)276-280
Number of pages5
JournalChemical Physics Letters
Volume492
Issue number4-6
DOIs
Publication statusPublished - 7 Jun 2010

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