Imidazolium-Based Protic Ionic Liquids as Electrolytes for Lithium-Ion Batteries
Imidazolium-Based Protic Ionic Liquids as Electrolytes for Lithium-Ion Batteries
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DOI：
10.1002/batt.201800096
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发表时间：
2019-01-01
影响因子：
5.7
通讯作者：
Balducci, Andrea
中科院分区：
文献类型：
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作者：
Stettner, Timo;Walter, Florian C.;Balducci, Andrea
质子离子液体(PILS)被认为是实现高性能锂离子电池(LIBS)的一类很有前途的离子液体。在这项工作中，我们合成了四种不同的含咪唑基阳离子1，2-二甲基咪唑(1，2-DMim(+))和1-甲基咪唑(1mim(+))，以及阴离子双(三氟甲磺酰基)亚胺(TFSI-)和双(氟磺酰亚胺)(FSI-)。结果表明，这些电极具有良好的导电性和较低的粘度，可以成功地与磷酸铁锂(LFP)电极结合使用。在所研究的电解液中，0.5M LiTFSI在1，2-DMImTFSI中被认为是实现高C速率下高容量保持率和高循环稳定性的最有前途的候选材料。
Protic ionic liquids (PILs) have been indicated as a promising class of ionic liquids (ILs) for the realization of high-performance lithium-ion batteries (LIBs). In this work we synthesize four different PILs containing the imidazolium-based cations 1,2-Dimethylimidazolium (1,2-DMim(+)) and 1-Methylimidazolium (1Mim(+)), and the anions bis(trifluoromethanesulfonyl)imide (TFSI-) and bis(fluorosulfonyl)imide (FSI-). We show that these PILs display good conductivities and low viscosities and that they can be successfully used in combination with lithium iron phosphate (LFP) electrodes. Among the investigated electrolytes, 0.5 M LiTFSI in 1,2-DMImTFSI appears as the most promising candidate for the realization of systems with high capacity retentions at high C-rates and high cycling stabilities.