液流电池用含氟磺化聚芳醚酮质子交换膜的制备  

Preparation of fluorine-containing sulfonated poly(aryl ether ketone)s for VBFR application

作　　者：孔令涛[1] 陈娟[1] 崔青青[1] 陈清松[1] 黄雪红[1] 丁富传[1] 

机构地区：[1]福建师范大学材料科学与工程学院,福建省高分子重点实验室,福州350007

出　　处：《功能材料》2017年第6期6215-6220,共6页Journal of Functional Materials

基　　金：福建省科技厅引导性资助项目(2016H0012);福建省教育厅产学研资助项目(JA15101)

摘　　要：质子交换膜是液流电池的核心部件之一。以6F-双酚A(6F-BPA)、二氟二苯甲酮(DFBP)及磺化二氟二苯甲酮(SDFBP)为共聚单体,经由逐步缩聚反应,通过调整DFBP与SDFBP的投料比,合成了3种含氟磺化聚芳醚酮,采用溶液浇铸成膜的方法制备成质子交换膜。傅立叶红外、核磁氢谱及离子交换容量的表征结果表明所合成聚合物的结构与目标产物的结构相一致。当SDFBP与DFBP的投料比为1∶1时,所制备的质子交换膜具有最高的H^+传导选择性,所组装的钒流电池在充放电流为50mA/cm^2时,电池的库仑效率、电压效率、能量效率分别达到95%,78%,74%,优于同等条件下Nafion 117膜的性能。Proton exchange membrane is a key part of vanadium redox flow battery（VRFB）.Three type of fluorine-containing sulfonated poly（fluorenyl ether ketone）s（SPEEK-6Fs）with different ion exchange capacity（IEC）were synthesized from sulfonated-4,4′-difluorobenzophenone（SDFBP）,4,4′-difluorobenzophenone（DFBP）and hexafluoro bisphenol A（6FBPA）by changing the molar ratio of the SDFBP and DFBP.The SPEEK-6Fs were fabricated into membranes by solution cast using DMSO as solvent.The structure of the synthesized SPEEK-6Fwas verified by characterization of FT-IR,NMR and ion exchange content.The results show that the structure of the synthesized SPEEK-6Fwas as same as the desired product＇s.The prepared membrane has best H＋selectivity when the molar ratio of the monomer SDFBP and DFBP is 1∶1.The membrane made from SPEEK-6F50 has better comprehensive performance of single VRFB than Nafion117 with 95%of coulombic efficiency,78% of voltage efficiency and 74% of energy efficiency,when the charge-discharge current is 50mA/cm^2.

关 键 词：全钒液流电池 质子交换膜 含氟磺化聚芳醚酮 传导选择性 

分 类 号：TB34[一般工业技术—材料科学与工程]