Progress of Non-Nucleophilic Electrolytes for Magnesium/Sulfur Battery

Non-nucleophilic magnesium electrolyte has attracted significant attention since the first non-nucleophilic organic aluminum magnesium salt with [Mg-2(mu-Cl)(3)(THF)(6)](+) as the cation of electrochemical active center for magnesium/sulfur (Mg/S) cells was reported by Muldoon group in 2011. In this work, we reviewed the synthesis, cation structure and electrochemical performance of non-nucleophilic magnesium electrolyte for Mg/S battery. The future research directions of non-nucleophilic Mg/S battery electrolyte are discussed. It is pointed out that in order to promote the industrialization of Mg/S battery, in addition to the development of non-nucleophilic electrolyte materials with high performance, low cost and simple structure, further mechanistic understanding for optimization of electrolyte composition and for better matching between the electrolyte with positive or negative electrode materials is also very important.