Improved Cycling Stability of Lithium-Metal Anode with Concentrated Electrolytes Based on Lithium (Fluorosulfonyl)(trifluoromethanesulfonyl)imide
Improved Cycling Stability of Lithium-Metal Anode with Concentrated Electrolytes Based on Lithium (Fluorosulfonyl)(trifluoromethanesulfonyl)imide
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基于(氟磺酰基)(三氟甲磺酰基)亚胺锂的浓缩电解质改善锂金属负极的循环稳定性
DOI：
10.1002/celc.201500520
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发表时间：
2016-04-01
期刊：
影响因子：
4
通讯作者：
Zhou, Zhibin
中科院分区：
文献类型：
--
作者：
Ma, Qiang;Fang, Zheng;Zhou, Zhibin
由Li[(FSO2)N(SO2CF3)] (LiFTFSI)、Li[N(SO2F)(2)] (LiFSI)和醚溶剂组成的新型浓缩电解质可以提高锂(Li)金属的循环稳定性并抑制锂金属枝晶的生长。即使在3 mA cm(-2)的高电流密度下，锂垂直棒铜电池也实现了>95%的高平均库伦效率和>250次循环的优异循环性能。此外，Li垂直棒LiFePO4电池表现出卓越的循环稳定性，在0.2 C下超过200次循环后容量保持率>92%，并具有出色的倍率能力。
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 vertical bar copper cells have been achieved, even at a high current density of 3 mA cm(-2). Moreover, the Li vertical bar 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.