Ye Hui, Huang Jian, Xu Jun John, Khalfan Amish, Greenbaum Steve G
Department of Materials Science and Engineering, Rutgers University, Piscataway, New Jersey 08854, USA.
J Electrochem Soc. 2007 Sep 21;154(11):A1048-A1057. doi: 10.1149/1.2779962.
Ionic liquids thermodynamically compatible with Li metal are very promising for applications to rechargeable lithium batteries. 1-methyl-3-propylpyrrolidinium bis(trifluoromethanesulfonyl)imide (P(13)TFSI) is screened out as a particularly promising ionic liquid in this study. Dimensionally stable, elastic, flexible, nonvolatile polymer gel electrolytes (PGEs) with high electrochemical stabilities, high ionic conductivities and other desirable properties have been synthesized by dissolving Li imide salt (LiTFSI) in P(13)TFSI ionic liquid and then mixing the electrolyte solution with poly(vinylidene-co-hexafluoropropylene) (PVDF-HFP) copolymer. Adding small amounts of ethylene carbonate to the polymer gel electrolytes dramatically improves the ionic conductivity, net Li ion transport concentration, and Li ion transport kinetics of these electrolytes. They are thus favorable and offer good prospects in the application to rechargeable Li batteries including open systems like Li/air batteries, as well as more "conventional" rechargeable lithium and lithium ion batteries.
与锂金属具有热力学相容性的离子液体在可充电锂电池的应用中非常有前景。在本研究中，1-甲基-3-丙基吡咯烷双（三氟甲磺酰）亚胺（P(13)TFSI）被筛选为一种特别有前景的离子液体。通过将锂亚胺盐（LiTFSI）溶解在P(13)TFSI离子液体中，然后将电解质溶液与聚（偏二氟乙烯-共-六氟丙烯）（PVDF-HFP）共聚物混合，合成了具有高电化学稳定性、高离子电导率和其他理想性能的尺寸稳定、弹性、柔性、非挥发性聚合物凝胶电解质（PGEs）。向聚合物凝胶电解质中添加少量碳酸亚乙酯可显著提高这些电解质的离子电导率、净锂离子传输浓度和锂离子传输动力学。因此，它们在包括锂/空气电池等开放系统以及更“传统”的可充电锂和锂离子电池在内的可充电锂电池应用中是有利的，并且具有良好的前景。
