title: Below the 12-vertex: 10-vertex carborane anions as non-corrosive, halide free, electrolytes for rechargeable Mg batteries.
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. Mg0/2+). 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.
authors.affiliation: Departments of Chemistry, University of California Riverside, Riverside, CA 92521, USA. vincent.lavallo@ucr.edu.
authors.forename: Scott G
authors.initials: SG
authors.lastname: McArthur
authors.forename: Rahul
authors.initials: R
authors.lastname: Jay
authors.forename: Linxiao
authors.initials: L
authors.lastname: Geng
authors.forename: Juchen
authors.initials: J
authors.lastname: Guo
authors.forename: Vincent
authors.initials: V
authors.lastname: Lavallo