Below the 12-vertex: 10-vertex carborane anions as non-corrosive, halide free, electrolytes for rechargeable Mg batteries

Scott G. McArthur; Rahul Jay; Linxiao Geng; Juchen Guo; Vincent Lavallo

doi:10.1039/C7CC01570D

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Below the 12-vertex: 10-vertex carborane anions as non-corrosive, halide free, electrolytes for rechargeable Mg batteries†

Scott G. McArthur,‡^a Rahul Jay,‡^b Linxiao Geng,^b Juchen Guo*^b and Vincent Lavallo

*^a

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* Corresponding authors

^a Departments of Chemistry, University of California Riverside, Riverside, CA 92521, USA
E-mail: vincent.lavallo@ucr.edu
Web: http://faculty.ucr.edu/~vincentl

^b Department of Chemical and Environmental Engineering, University of California Riverside, Riverside, CA 92521, USA
E-mail: jguo@engr.ucr.edu
Web: http://www.cee.ucr.edu/jguo

Abstract

The development of practical Mg based batteries is limited by the lack of a library of suitable electrolytes. Recently a 12-vertex closo-carborane anion based electrolyte has been shown to be the first electrolyte for Mg based batteries, which is both non-corrosive and has high electrochemical stability (+3.5 V vs. Mg^0/2+). Herein we show that smaller 10-vertex closo-carborane anions also enable electrolytes for Mg batteries. Reduction of the trimethylammonium cation of [HNMe₃¹⁺][HCB₉H₉¹⁻] with elemental Mg yields the novel magnesium electrolyte [Mg²⁺][HCB₉H₉¹⁻]₂. The electrolyte displays excellent electrochemical stability, is non-nucleophilic, reversibly deposits and strips Mg, and is halide free. This discovery paves the way for the development of libraries of Mg electrolytes based on more cost effective 10-vertex closo-carborane anions.

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DOI: https://doi.org/10.1039/C7CC01570D
Article type: Communication
Submitted: 28 Feb 2017
Accepted: 24 Mar 2017
First published: 24 Mar 2017

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Chem. Commun., 2017,53, 4453-4456

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Below the 12-vertex: 10-vertex carborane anions as non-corrosive, halide free, electrolytes for rechargeable Mg batteries

S. G. McArthur, R. Jay, L. Geng, J. Guo and V. Lavallo, Chem. Commun., 2017, 53, 4453 DOI: 10.1039/C7CC01570D

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Chemical Communications

Below the 12-vertex: 10-vertex carborane anions as non-corrosive, halide free, electrolytes for rechargeable Mg batteries†

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Below the 12-vertex: 10-vertex carborane anions as non-corrosive, halide free, electrolytes for rechargeable Mg batteries

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