PP14TFSI离子液体在可充镁电池电解液的应用  

Application of Ionic Liquid PP_(14)TFSI in Electrolyte Systems for Rechargeable Mg Batteries

作　　者：朱金杰 王菲菲[1] 郭永胜[1] 杨军[1] 努丽燕娜[1] 王久林[1] 

机构地区：[1]上海交通大学化学化工学院、平野材料创新研究所,上海200240

出　　处：《电化学》2014年第2期128-133,共6页Journal of Electrochemistry

摘　　要：制备了可充镁电池电解质苯酚基镁盐,以四氢呋喃(THF)与N-甲基-N-丁基-哌啶-双三氟甲基磺酰胺(PP14TFSI)离子液体混合物代替四氢呋喃作为该电解质的溶剂.当THF与PP14TFSI体积配比为1:1时,该苯酚基镁盐电解液镁可逆溶出性能最佳,电化学窗口宽(2.7 V vs.Mg),离子电导率高(7.77 mS·cm-1).此外,热重测试表明离子液体的加入大大降低了THF溶剂的挥发性,提高了可充镁电池的安全性能.四氢呋喃+N-甲基-N-丁基-哌啶-双三氟甲基磺酰胺混合溶剂有望作为可充镁电池电解液的首选溶剂.A phenolated-based Mg salt was prepared. The mixture of THF and N-methyl-N-butyl-piperidinium bis （trifluoromethanesulfonyl）imide （PP14TFSI） serves as the mixed solvent instead of pure THF for rechargeable Mg batteries systems. This new type of electrolyte system not only has optimal reversibility of Mg, but also owns a wide electrochemical window （2.7 V vs. Mg） and high ionic conductivity （7.77 mS·cm-1）. More importantly, the addition of Ionic Liquid suppresses the volatility of THF and improves the safety ofrechargeable Mg batteries. The result shows that the mixture of THF and piperidyl-based Ionic Liquid could be regarded as a good solvent candidate for rechargeable Mg batteries.

关 键 词：苯酚基镁盐 N-甲基N-丁基-哌啶-双三氟甲基磺酰胺 可充镁电池 混合溶剂 电解液 

分 类 号：TM912[电气工程—电力电子与电力传动]