Improved Cycling Stability of Lithium‐Metal Anode with Concentrated Electrolytes Based on Lithium (Fluorosulfonyl)(trifluoromethanesulfonyl)imide
作者： Qiang Ma , Zheng Fang , Pin Liu , Jie Ma , Xingguo Qi
关键词: Electrochemistry 、 Inorganic chemistry 、 Electrolyte 、 Lithium 、 Imide 、 Faraday efficiency 、 Lithium metal 、 Anode 、 Chemistry
摘要: A new type of concentrated electrolyte composed of Li [(FSO2) N (SO2CF3)](LiFTFSI), Li [N (SO2F) 2](LiFSI), and ether solvents can improve the cycling stability of lithium (Li) metal and inhibit Li‐metal dendritic growth. The high average coulombic efficiency of> 95% and excellent cycling performance of> 250 cycles for the Li| copper cells have been achieved, even at a high current density of 3 mA cm− 2. Moreover, the Li| LiFePO4 cell exhibits superior cycling stability with capacity retention of> 92% at 0.2 C for more than 200 cycles …
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