凝胶浴对钒电池用侧链型杂萘联苯聚醚酮多孔膜结构和性能的影响  

Effect of Coagulation Bath on the Structure and Properties of Side-Chain Porous Anion Exchange Membrane for Vanadium Redox Flow Battery Application

作　　者：王昭琪 张守海[1] 刘乾 杨研 卓琳 孙范忱 刘泽元 蹇锡高[1] Zhaoqi Wang;Shouhai Zhang;Qian Liu;Yan Yang;Lin Zhuo;Fanchen Sun;Zeyuan Liu;Xigao Jian(School of Chemical Engineering,Dalian University of Technology,Liaoning High Performance Resin Engineering Technology Research Center,Liaoning Key Laboratory of Polymer Science and Engineering,Dalian Key Laboratory of Membrane Materials and Pr ocesses,Dalian 116024,China)

机构地区：[1]大连理工大学化工学院辽宁省高性能树脂工程技术研究中心辽宁省高分子材料与工程重点实验室大连市膜材料与膜过程重点实验室,辽宁大连116024

出　　处：《高分子材料科学与工程》2023年第1期127-133,共7页Polymer Materials Science & Engineering

基　　金：国家自然科学基金资助项目(91860204);国家自然科学基金创新研究群体科学基金(22021005);辽宁省“兴辽英才计划”(XLYC1802073);大连市高层次人才创新支持计划(2019RD08);中央高校基本科研业务费(DUT20TD114)。

摘　　要：以含苄基氯结构的杂萘联苯聚醚酮(CMPPEK-P)为原料、三甲胺为胺化试剂,通过先制膜后胺化的方式,利用水蒸气诱导相分离法(VIPS)成功制备了一种高性能钒电池用含有季铵基侧链的杂萘联苯聚醚酮(QAPPEK-P)多孔阴离子交换膜。研究了在VIPS过程中,不同浓度氯化钠水溶液(质量分数0%~26%,下同)作为凝胶浴对膜结构和性能的影响:提高氯化钠浓度,QAPPEK-P膜的孔隙率提高,面电阻显著降低,而其阻钒性能无明显变化。其中,在凝胶浴盐浓度为26%条件下制得的QAPPEK-P膜,装载其单电池的电池效率最佳:在电流密度为140 mA/cm2时,能量效率可达80%;且其电池性能在120 mA/cm2的电流密度下,充放电150个循环后无明显变化,显示出良好的化学稳定性,证明了QAPPEK-P在多孔阴离子交换膜在钒电池应用中的潜力。In vapor induced phase separation(VIPS)process,using poly(phthalazinone ether ketone)s with benzyl chloride moieties(CMPPEK-P)as material,trimethylamine as amination reagent,a novel anion exchanged porous membrane(QAPPEK-P)with high battery performance was obtained and could be used in vanadium redox flow battery(VRFB).It is studied that how different concentrations of NaCl solution(mass fraction of 0%~26%)as coagulation bath affect the structure and properties of the QAPPEK-P membrane.With the increase of NaCl concentration in coagulation bath,the results show that the porosity of the QAPPEK-P membranes increase,and the vanadium ion permeability of the membranes changes little,but the area resistance becomes lower.The QAPPEK-P membrane with the coagulation bath concentration 26%possesses the best cell performance,which shows a higher energy efficiency(80%)than Nafion 115(76.8%)at 140 mA/cm2,and the membrane shows stable cell performance up to 150 cycles test at the current density of 120 mA/cm2.It is indicated that the QAPPEK-P membrane shows favorable development prospects for vanadium redox flow battery.

关 键 词：侧链型聚芳醚酮 多孔阴离子交换膜 凝胶浴 全钒液流电池 

分 类 号：TM91[电气工程—电力电子与电力传动]