双取代咪唑离子液体与杂多酸复合质子导体的研究

以离子液体1-丁基-3-甲基咪唑磷酸二氢盐(BMIMH2PO4)与杂多酸,即磷钨酸(PWA)和硅钨酸(SiWA)为原料,制备了非水复合质子导体.研究了该复合质子导体在80～180℃不加湿条件下的电导率,探讨了PWA/BMIMH2PO4复合体系的质子传导机理.研究表明,在PWA/BMIMH2PO4中掺杂P2O5可以提高体系的质子电导率,而共存的离子液体具有促进质子传导的作用.在160℃非水条件下,当PWA与BMIMH2PO4摩尔比为1∶3时,复合质子导体PWA/BMIMH2PO4的电导率为2.6×10-3S/cm,而掺杂P2O5的质量分数为10%时,PWA/BMIMH2PO4/P2O5的电导率则...

Composite Proton Conductors Based on Ionic Liquid 1-Buty-3- Methylimidazolium Dihydrogen Phosphate and Heteropolyacids

Anhydrous composite proton conductors were prepared with ionic liquid 1-buty3-methylimidazolium dihydrogen phosphate(BMIMH2PO4) and heteropolyacids(HPA),i.e.,phosphotungstic acid(PWA) and silicotungstic acid(SiWA).The conductivities of the composite proton conductors were investigated at 80～180 ℃ without humidification.The proton conducting mechanism of PWA/BMIMH2PO4 composite was studied.The results indicated that the dopant of phosphorous pentoxide(P2O5) in the composite enhances the proton conductivity and the presence of the ionic liquid BMIMH2PO4 promotes the proton conduction in the anhydrous composite proton conductors.The conductivity of PWA/BMIMH2PO4(mole ratio=1∶3) was 2.6×10-3 S/cm at 160 ℃ under anhydrous condition.In the presence of P2O5(10wt%),the corresponding conductivity was increased to 4.1×10-2 S/cm under the same conditions.