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Synthesis, Crystal Structure, and Electrochemical Properties of a Simple Magnesium Electrolyte for Magnesium/Sulfur Batteries
Author(s) -
Li Wanfei,
Cheng Shuang,
Wang Jian,
Qiu Yongcai,
Zheng Zhaozhao,
Lin Hongzhen,
Nanda Sanjay,
Ma Qian,
Xu Yan,
Ye Fangmin,
Liu Meinan,
Zhou Lisha,
Zhang Yuegang
Publication year - 2016
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201600256
Subject(s) - magnesium , electrolyte , passivation , electrochemistry , inorganic chemistry , chemistry , metal , sulfur , ionic conductivity , electrode , organic chemistry , layer (electronics)
Most simple magnesium salts tend to passivate the Mg metal surface too quickly to function as electrolytes for Mg batteries. In the present work, an electroactive salt [Mg(THF) 6 ][AlCl 4 ] 2 was synthesized and structurally characterized. The Mg electrolyte based on this simple mononuclear salt showed a high Mg cycling efficiency, good anodic stability (2.5 V vs. Mg), and high ionic conductivity (8.5 mS cm −1 ). Magnesium/sulfur cells employing the as‐prepared electrolyte exhibited good cycling performance over 20 cycles in the range of 0.3–2.6 V, thus indicating an electrochemically reversible conversion of S to MgS without severe passivation of the Mg metal electrode surface.