Effect of 1-allyl-1-methylpyrrolidinium chloride addition to ethylmagnesium bromide electrolyte on a rechargeable magnesium battery

•AMPyrCl is evaluated as an additive for a rechargeable Mg battery electrolyte.•AMPyrCl significantly enhances the anodic stability of EtMgBr by about 1V.•AMPyrCl improves the coulombic efficiency and kinetics of Mg deposition and stripping.•AMPyrCl works well in a prototype cell consisting of a Mo6...

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Published in:Electrochimica acta 2017-03, Vol.231, p.379-385
Main Authors: Cho, Jae-Hyun, Ha, Jung Hoon, Lee, Sang-Hoon, Cho, Byung Won, Chung, Kyung Yoon, Na, Byung-Ki, Kim, Kwang-Bum, Oh, Si Hyoung
Format: Article
Language:English
Subjects:
1-allyl-1-methylpyrrolidinium chloride
Anodic stability
Batteries
Electrolyte solution
Electrolytes
Grignard solution
Ionic liquids
Magnesium
Reaction kinetics
Rechargeable batteries
Rechargeable magnesium battery
Stripping
Studies
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Summary:•AMPyrCl is evaluated as an additive for a rechargeable Mg battery electrolyte.•AMPyrCl significantly enhances the anodic stability of EtMgBr by about 1V.•AMPyrCl improves the coulombic efficiency and kinetics of Mg deposition and stripping.•AMPyrCl works well in a prototype cell consisting of a Mo6S8 cathode and Mg anode. The ionic liquid 1-allyl-1-methylpyrrolidinium chloride was investigated as an additive to an ethylmagnesium bromide Grignard solution, for use as an advanced electrolyte in rechargeable Mg batteries. Electrochemical studies showed that the addition of the ionic liquid significantly enhanced the anodic limit of the Grignard solution by about 1V and improved the coulombic efficiency and the kinetics of Mg deposition-stripping reactions on the negative electrode. We have also demonstrated that the Grignard solution containing the ionic liquid works well as an electrolyte in a prototype cell consisting of a Mo6S8 Chevrel phase cathode and a Mg metal anode, where the original Grignard electrolyte does not function properly.
ISSN:0013-4686
1873-3859
DOI:10.1016/j.electacta.2017.02.062