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A Fluorinated Alkoxyaluminate Electrolyte for Magnesium-Ion Batteries

Author(s): Herb, Jake T; Nist-Lund, Carl A; Arnold, Craig B

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Abstract: he lack of electrolytes that simultaneously possess highCoulombic efficiency, conductivity, and voltage stability has hindered thedeployment of rechargeable magnesium-ion batteries. With few exceptions,the tenacious oxide layer on magnesium metal has limited the scope ofresearch to halide ion-based electrolytes, which help activate the electrodesurface but also limit the working voltage window considerably. Herein, wedemonstrate a new class of magnesium electrolytes based onfluoroalkox-yaluminate anions synthesized via a facile and scalable method and itsincorporation in a full battery cell. Mixtures of magnesium and aluminumfluoroalkoxides in ethereal solvents result in solutions that can reversiblydeposit magnesium metal with near unit efficiency in addition to achieving suitable oxidative stabilities (>3.5 V vs Mg/Mg2+on glassy carbon and gold) and conductivities (>6 mS cm−1).
Publication Date: 9-Dec-2016
Citation: Herb, Jake T, Nist-Lund, Carl A, Arnold, Craig B. (2016). A Fluorinated Alkoxyaluminate Electrolyte for Magnesium-Ion Batteries. ACS Energy Letters, 1 (6), 1227 - 1232. doi:10.1021/acsenergylett.6b00356
DOI: doi:10.1021/acsenergylett.6b00356
ISSN: 2380-8195
EISSN: 2380-8195
Pages: 1227 - 1232
Type of Material: Journal Article
Journal/Proceeding Title: ACS Energy Letters
Version: Final published version. Article is made available in OAR by the publisher's permission or policy.

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