摘要
高碱稳定性、高离子电导率的阴离子交换膜的设计与制备是近年来燃料电池领域研究的前沿和热点.从分子设计出发,以在聚合物主链上引入稳定性优异的氟原子为基础,在侧基上进行功能性基团的嫁接,合成了吗啉、直链季铵、咪唑型的全氟阳离子聚合物,并将这些聚合物制成相应的阴离子交换膜.结果显示,所得3种阴离子交换膜在80℃水中的离子电导率为60.4～80.6mS/cm.其中,直链季铵型阴离子交换膜在80℃下的电导率达到80.6mS/cm.此外,在80℃,8 mol/L KOH水溶液中浸泡10d后,离子膜的IEC和电导率分别保留了92.7%和93.2%,表现出优异的耐碱性能.
The design and fabrication of anion exchange membranes(AEMs)with high alkaline stability and high ionic conductivity is one of the frontier research areas in the fuel cells field.Here,we design and prepare a series of perfluorinated cationic polymers and their AEMs.Linear-quaternary-ammonium,cyclicmorpholine and imidazole-functionalized cationic polymers have been successfully synthesized by incorporation of highly stable fluoro groups in the polymer main chain and utilization of the pendant groups to attach various functional groups.The resulting AEMs displayed high conductivity of 60.4~80.6 mS/cm at 80℃in water.Additionally,the linear-quaternary-ammonium membrane exhibited good hydroxide conductivity of 80.6 mS/cm at 80 ℃ and excellent dimensional stability in water.Moreover,the membrane maintained 92.7% IECand 93.2% hydroxide conductivity value after immersion in 8 mol/L KOH at 80℃ over ten days and thus exhibits good alkaline stability.
作者
刘训道
陈晓红
王丽
李虹
张永明
LIU Xundao;CHEN Xiaohong;WANG Li;LI Hong;ZHANG Yongming(School of Chemistry and Chemical Engineering,Shanghai Jiao Tong University,Shanghai Z00Z40,China;School of Material Science and Engineering,University of Jinan,Jinan 250022,China;Shandong Dongyue Polymer Material Co.Ltd.,Zibo 256401,China)
出处
《膜科学与技术》
CAS
CSCD
北大核心
2018年第6期14-21,共8页
Membrane Science and Technology
基金
国家自然科学基金(51573090)
国家重点研发计划(2016YFB0302000)
含氟功能膜材料国家重点实验室开放课题基金(FM201601)
关键词
全氟阳离子聚合物
阴离子交换膜
燃料电池
perfluorinated cationic polymers
anion exchange membrane
fuel cell
