摘要
以N-甲基-N-丙基吡咯鎓(PY13+)、N-甲基-N-丙基哌啶鎓(PI13+)为阳离子,双(氟磺酰)亚胺(FSI-)、双(三氟甲基磺酰)亚胺(TFSI-)为阴离子,合成了PY13[TFSI]、PI13[TFSI]、PY13[FSI]及PI13[FSI]4种室温离子液体,通过核磁共振对合成的离子液体进行了表征,并考察了4种离子液体的物理、化学和电化学性能,包括黏度、热行为、电导率和电化学稳定性等。4种离子液体的熔点均低于15℃,电化学窗口均超过3.6 V,且在低于300℃的条件下较稳定,其中离子液体PY13 [FSI]的综合性能最佳,具有较好的电化学应用前景。
Four kinds of room temperature ionic liquids PY13[TFSI], PI13[TFSI], PY13[FSI] and PI13[FSI] are synthesized based on cation N-methyl-N-propylpyrrolium(PY13+), N-methyl-N-propylpiperidinium(PI13+), as well as anion bis(fluorosulfonyl)imide(FSI-), bis(trifluoromethylsulfonyl)imide(TFSI-). Structure of the four kinds ionic liquids are characterized by NMR. Physical, chemical and electrochemical properties such as viscosity, thermal behavior, electrical conductivity and electrochemical stability are investigated as well. The melting points of all the four ionic liquids are lower than 15 ℃, and the electrochemical windows are wider than 3.6 V. These four kinds ionic liquid are relatively stable below 300 ℃. The ionic liquid PY13 [FSI] performs much better than the others on electrical properties and shows good prospects for chemical applications.
作者
张楚璠
付春
孔京
黄伟
贾凤
ZHANG Chufan;FU Chun;KONG Jing;HUANG Wei;JIA Feng(SINOPEC Nanjing Research Institute of Chemical Industry Co.,Ltd.,Nanjing 21004&China)
出处
《能源化工》
CAS
2020年第6期34-39,共6页
Energy Chemical Industry
关键词
离子液体
电解液
锂电池
性能
ionic liquid
electrolyte
lithium battery
performance
