Details

Autor(en) / Beteiligte

• Ma, Qiang
• Fang, Zheng
• Liu, Pin
• Ma, Jie
• Qi, Xingguo
• Feng, Wenfang
• Nie, Jin
• Hu, Yong-Sheng
• Li, Hong
• Huang, Xuejie
• Chen, Liquan
• Zhou, Zhibin

Titel

Improved Cycling Stability of Lithium-Metal Anode with Concentrated Electrolytes Based on Lithium (Fluorosulfonyl)(trifluoromethanesulfonyl)imide

Ist Teil von

• ChemElectroChem, 2016-04, Vol.3 (4), p.531-536

Ort / Verlag

Weinheim: Blackwell Publishing Ltd

Erscheinungsjahr

2016

Quelle

Wiley Online Library

Beschreibungen/Notizen

• 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 and excellent C‐rate capability. Exhibitionist! A concentrated electrolyte based on a salt of LiFTFSI for application in rechargeable Li batteries can improve the cycling stability of Li metal and inhibit Li‐metal dendritic growth. The Li|Cu cell displays a high average coulombic efficiency and excellent cycling performance, even at a high current density. Moreover, the Li|LiFePO4 cell exhibits superior cycling stability with capacity retention of >92 % at 0.2 C for more than 200 cycles and excellent rate capability.