The Metamorphosis of Mg(SO3CF3)2‐based Electrolytes for Rechargeable Magnesium Batteries

Author:

Chen Jinlong123,Tan Shuangshuang14ORCID,Li Lingjie13,Huang Guangsheng14,Wang Jingfeng14,Pan Fusheng14

Affiliation:

1. National Engineering Research Center for Magnesium Alloys Chongqing University Chongqing 400044 China

2. College of Chemical Engineering Sichuan University of Science and Engineering Zigong City Sichuan Province 643000 China

3. School of Chemistry and Chemical Engineering Chongqing University Chongqing 400044 China

4. College of Materials Science and Engineering Chongqing University Chongqing 400044 China

Abstract

AbstractCost‐effective, non‐corrosive and non‐nucleophilic Mg(SO3CF3)‐based electrolytes with high anodization stability are promising candidates for realizing high‐performance rechargeable magnesium batteries (RMBs). Since the 1990s, the community has developed polymer‐based, room‐temperature molten salt‐based, chlorine‐containing and chlorine‐free electrolyte systems using Mg(SO3CF3)2 as the simple magnesium salt. However, there is currently a lack of overall understanding of the metamorphosis of Mg(SO3CF3)2‐based electrolytes. This survey reviews the development of various branches of Mg(SO3CF3)2‐based electrolytes, with a special focus on strategies to improve electrolyte performance. First, the utilization of various polymer matrices, room‐temperature molten salts, inorganic/organic chlorine salts and chelating ligands to promote the performance of Mg(SO3CF3)2‐based (quasi‐)solid and liquid electrolytes is outlined. Subsequently, combining the passivation nature of Mg(SO3CF3)2 and polar aprotic solvents toward the Mg anode and the current improvement strategies, the future challenges and opportunities of Mg(SO3CF3)2‐based electrolytes in various branches are discussed. These summaries and discussions will provide guidelines for the development of Mg(SO3CF3)2‐based electrolytes with desirable properties for RMBs.

Funder

National Natural Science Foundation of China

China Postdoctoral Science Foundation

Publisher

Wiley

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