DMFC用质子型离子液体复合隔膜的制备及性能表征  

Preparation of the Protic Ionic Liquid/PVDF-HFP Composite Membranes and its Performance for DMFC

作　　者：苗睿瑛[1] 李建玲[1] 方勇[1] 王新东[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《电化学》2009年第1期52-55,共4页Journal of Electrochemistry

基　　金：国家863计划(No.2006AA03Z224和No.2007AA05Z150);国家自然科学基金(50528404;50874008)资助

摘　　要：由酸碱中和法制得质子型离子液体α-甲基吡啶三氟乙酸盐,再经相转化将质子型离子液体与PVDF-HFP复合成(PIL)/PVDF-HFP膜.交流阻抗测试表明,复合膜电导率随温度增加而递增,室温电导率:8×10-3S/cm,30℃电导率:1×10-2S/cm,80℃电导率:3×10-2S/cm.用计时电流法研究复合前后膜的甲醇渗透性能,结果显示,该离子液体复合前、后膜的阻醇性能无明显变化,但复合膜阻醇性能略优.The protic ionic liquid （PIL） a-methyl pyridinium trifluoroacetate （ [ α-MPyH] Tfa） was synthesized by acid ＆ alkali neutralization. Then PIL/PVDF-HFP composite membranes were prepared by means of phase inversion method using acetone as solvent. The conductivities of the composite membrane increased with the temperature and reached 8 ×10^-3 S/cm, 1 × 10^-2 S/cm and 3 × 10^-2 S/cm at room-temperature, 30 ℃ and 80℃, respectively, by electrochemical impedance method. The properties of the methanol-rejecting of the membranes were measured by chronoamperometry as well. The results indicate that the properties of methanol-resistance of the membranes before and after IL combination were equivalent approximately.

关 键 词：DMFC 质子型离子液体 PVDF—HFP 电导率 阻醇性能 

分 类 号：TM911.4[电气工程—电力电子与电力传动]