螺环柔性侧链PBI基阴离子交换膜的性能  

Properties of N-spirocyclic flexible side chain type PBI anion exchange membranes

作　　者：杨照照 王小舟 陈婉婷 崔福军 贺高红[1,2] 吴雪梅 YANG Zhaozhao;WANG Xiaozhou;CHEN Wanting;CUI Fujun;HE Gaohong;WU Xuemei(State Key Laboratory of Fine Chemicals,Dalian University of Technology,Membrane Science and Technology Research and Development Center,Dalian 116024,China;Panjin Institute of Industrial Technology,Dalian University of Technology,Panjin 124221,China)

机构地区：[1]大连理工大学精细化工国家重点实验室,膜科学与技术研究开发中心,大连116024 [2]大连理工大学盘锦产业技术研究院,盘锦124221

出　　处：《膜科学与技术》2023年第6期71-78,88,共9页Membrane Science and Technology

基　　金：国家自然科学基金创新研究群体项目(22021005)。

摘　　要：提出具有高碱稳定性的螺环柔性侧链PBI基阴离子交换膜结构(ASD-PBI-x)概念.以二溴丁烷和1,3-二(4-哌啶基)丙烷为原料制备了螺环阳离子基团,以聚苯并咪唑(PBI)为基材,接枝螺环阳离子柔性侧链,主链和侧链结构均具有强碱稳定性,双醚柔性间隔基团提高了刚性螺环结构的成膜性,并促进了膜内良好的微相分离形貌形成.结果表明,该系列膜具有良好的性能,其中接枝度为90%的ASD-PBI-90膜在80℃时的电导率为83.2 mS/cm,在1 mol/L KOH、80℃浸泡1080 h后,膜的OH-电导率保持率达到94.2%.将该膜用于氢氧燃料电池,在60℃时单电池的峰值功率密度为367 mW/cm^(2).ASD-PBI膜具有优异的碱稳定性、良好的电导率和电池性能,有望应用于氢氧燃料电池领域.In this work,a N-spirocyclic flexible side chain type PBI anion exchange membrane is proposed,in which both main chain and side chain structures have strong alkali stability.The N-spirocyclic cationic group was prepared by 1,4-dibromobutane and 1,3-bis(4-piperidine)propane,and polybenzimidazole(PBI)was used as substrate to graft the flexible side chain of N-spirocyclic cationic groups.The flexible diether-oxygen spacer in side chain promotes the membrane-forming ability of the highly rigid N-spirocyclic group,as well as the good microphase separation morphology in the membrane.The ASD-PBI-90 membrane shows conductivity of about 83.2 mS/cm,as well as excellent alkaline stability with around 94.2%retention in conductivity after soaking in 1 mol/L KOH solution at 80℃for 1080 h.H2/O2 fuel cell performance assembled with ASD-PBI-90 membrane exhibits a maximum peak power density of 367 mW/cm2 at 60℃.ASD-PBI membranes show excellent alkali stability,good conductivity and fuel cell performance,which is promising to H2/O2 fuel cell applications.

关 键 词：阴离子交换膜 螺环 聚苯并咪唑 碱稳定性 燃料电池 

分 类 号：TQ028[化学工程] TM912.1[电气工程—电力电子与电力传动]