Atom-efficient synthesis of a benchmark electrolyte for magnesium battery applications

Brown, Scott A. and Cussen, Serena A. and Kennard, Rhiannon and Marchesini, Sofia and Pryke, Jethro J. and Rae, Annabel and Robertson, Stuart D. and Samajdar, Rudra N. and Wain, Andrew J. (2022) Atom-efficient synthesis of a benchmark electrolyte for magnesium battery applications. Chemical Communications, 58 (86). pp. 12070-12073. ISSN 1359-7345 (https://doi.org/10.1039/d2cc03290b)

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Abstract

The benchmark magnesium electrolyte, [Mg2Cl3]+ [AlPh4]−, can be prepared in a 100% atom-economic fashion by a ligand exchange reaction between AlCl3 and two molar equivalents of MgPh2. NMR and vibrational spectroscopy indicate that the reported approach results in a simpler ionic composition than the more widely adopted synthesis route of combining PhMgCl with AlCl3. Electrochemical performance has been validated by polarisation tests and cyclic voltammetry, which demonstrate excellent stability of electrolytes produced via this atom-efficient approach.