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A Stable, Non‐Corrosive Perfluorinated Pinacolatoborate Mg Electrolyte for Rechargeable Mg Batteries
Author(s) -
Luo Jian,
Bi Yujing,
Zhang Liping,
Zhang Xiaoyin,
Liu Tianbiao Leo
Publication year - 2019
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201902009
Subject(s) - electrolyte , overpotential , anode , faraday efficiency , electrochemistry , battery (electricity) , reagent , materials science , energy storage , chemical engineering , chemistry , chloride , inorganic chemistry , metallurgy , electrode , organic chemistry , power (physics) , physics , quantum mechanics , engineering
Mg batteries are a promising energy storage system because of the physicochemical merits of Mg as an anode material. However, the lack of electrochemically and chemically stable Mg electrolytes impedes the development of Mg batteries. In this study, a newly designed chloride‐free Mg perfluorinated pinacolatoborate, Mg[B(O 2 C 2 (CF 3 ) 4 ) 2 ] 2 (abbreviated as Mg‐FPB ), was synthesized by a convenient method from commercially available reagents and fully characterized. The Mg‐FPB electrolyte delivered outstanding electrochemical performance, specifically, 95 % Coulombic efficiency and 197 mV overpotential, enabling reversible Mg deposition, and an anodic stability of up to 4.0 V vs. Mg. The Mg‐FPB electrolyte was applied to assemble a high voltage, rechargeable Mg/MnO 2 battery with a discharge capacity of 150 mAh g −1 .