Rational Design of an Ionic Liquid‐Based Electrolyte with High Ionic Conductivity Towards Safe Lithium/Lithium‐Ion Batteries
作者:Shengjie Zhang、Junhao Li、Ningyi Jiang、Xuqiu Li、Sivakumar Pasupath、Yanxiong Fang、Quanbing Liu、Dai Dang
DOI:10.1002/asia.201900581
日期:——
the safety and high-temperature performance of lithium/lithium-ion batteries (LIBs). Here, a novel ionic liquid, 1-(2-ethoxyethyl)-1-methylpyrrolidinium bis(trifluoromethylsulfonyl)imide (PYR1(2o2) TFSI), was designed and synthesized, and then mixed with dimethyl carbonate (DMC) as appropriate solvent and LiTFSI lithium salt to produce an electrolyte with high ionic conductivity for safe LIBs. Various
提高锂/锂离子电池(LIB)的安全性和高温性能是一项非常紧迫而重要的任务。在这里,设计并合成了一种新型离子液体1-(2-乙氧基乙基)-1-甲基吡咯烷鎓双(三氟甲基磺酰基)酰亚胺(PYR1(2o2)TFSI),然后与作为适当溶剂的碳酸二甲酯(DMC)和LiTFSI混合锂盐可产生具有高离子电导率的电解质,可用于安全的LIB。各种表征和测试表明,高柔性醚基可以显着降低粘度并为锂离子提供配位点,而DMC可以降低粘度并有效提高锂离子的传输速率和转移数。在室温和60°C的高温下,该电解质在Li / LiFeO4电池中表现出出色的电化学性能。更重要的是,添加DMC后,基于IL的电解质仍不易燃,适当的DMC可以有效抑制锂树枝状晶体的生长。我们目前的工作可能会为锂和锂离子电池的高性能和安全性提供有吸引力且有前途的策略。