Optimization of cation structure of imidazolium-based ionic liquids as ionic solvents for rechargeable magnesium batteries

A series of imidazolium cation-based ionic liquids (ILs) have been synthesized and examined as ionic solvents for rechargeable magnesium batteries. The electrolyte solutions consist of these ILs dissolving methylmagnesium bromide with tetrahydrofuran (MeMgBr/THF). The chemical structure of imidazoli...

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Bibliographic Details
Published in:Electrochemistry communications 2010-11, Vol.12 (11), p.1630-1633
Main Authors: Kakibe, Takeshi, Yoshimoto, Nobuko, Egashira, Minato, Morita, Masayuki
Format: Article
Language:English
Subjects:
Applied sciences
Cathodic deposition
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Exact sciences and technology
Ionic liquid
Magnesium battery
Methyl magnesium bromide
Structure optimization
Substituted imidazolium cation
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Summary:A series of imidazolium cation-based ionic liquids (ILs) have been synthesized and examined as ionic solvents for rechargeable magnesium batteries. The electrolyte solutions consist of these ILs dissolving methylmagnesium bromide with tetrahydrofuran (MeMgBr/THF). The chemical structure of imidazolium cation much influenced the ionic conductivity and the electrochemical window of the system. A reversible process of cathodic deposition and anodic dissolution of magnesium has been successfully achieved at room temperature. The highest value of anodic peak current for magnesium dissolution was obtained in an optimized-structure IL with allyl and methoxyethyl groups as the substituents.
ISSN:1388-2481
1873-1902
DOI:10.1016/j.elecom.2010.09.012