Issue 69, 2020, Issue in Progress
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RSC Advances

Reversible electrodeposition and stripping of magnesium from solvate ionic liquid–tetrabutylammonium chloride mixtures†

Pieter Geysens, ORCID logo a   Jan Fransaer ORCID logo b  and  Koen Binnemans ORCID logo *a  

* Corresponding authors

a Department of Chemistry, KU Leuven, Celestijnenlaan 200F, P.O. Box 2404, B-3001 Leuven, Belgium
E-mail: Koen.Binnemans@kuleuven.be

b Department of Materials Engineering, KU Leuven, Kasteelpark Arenberg 44, B-3001 Leuven, Belgium

Abstract

The physicochemical properties of three new magnesium-containing solvate ionic liquids are reported. The solvation structures were analysed by Raman spectroscopy, revealing a solvent separated ion pair structure at room temperature. The reversible electrodeposition and stripping of magnesium from mixtures of these solvate ionic liquids and tetra-n-butylammonium chloride is described. The electrolytes are significantly less volatile than similar dilute electrolytes, even at elevated temperatures and the deposition current densities exceed 1 A dm−2 at 80 °C. The influence of the chloride concentration on magnesium deposition was studied with cyclic voltammetry and chronopotentiometry. It was found that the stripping of magnesium is governed by two competing reactions, and the addition of tetrabutylammonium chloride to the solvate ionic liquids was necessary to prevent passivation and efficiently strip the deposited magnesium.

Graphical abstract: Reversible electrodeposition and stripping of magnesium from solvate ionic liquid–tetrabutylammonium chloride mixtures

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Article information

DOI
https://doi.org/10.1039/D0RA08187F
Article type
Paper
Submitted
24 Sep 2020
Accepted
09 Nov 2020
First published
18 Nov 2020
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2020,10, 42021-42029

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Reversible electrodeposition and stripping of magnesium from solvate ionic liquid–tetrabutylammonium chloride mixtures

P. Geysens, J. Fransaer and K. Binnemans, RSC Adv., 2020, 10, 42021 DOI: 10.1039/D0RA08187F

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