杂萘联苯聚芳醚酮含量对钒电池用离子交换膜性能的影响  

Effect of poly(phthalazinone ether ketone)content on the performance of novel ion exchange membrane for vanadium redox flow battery applications

作　　者：陈宇宁 张守海[1] 刘乾 薛仁东 蹇锡高[1] 

机构地区：[1]大连理工大学化工学院高分子材料系,辽宁省高性能树脂工程技术研究中心,辽宁省高分子科学与工程重点实验室,辽宁大连116024

出　　处：《功能材料》2018年第2期2013-2017,2023,共6页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21276037);大连市科技计划资助项目(LJQ2014009)

摘　　要：将含溴甲基杂萘联苯聚醚酮与杂萘联苯聚芳醚酮(PPEK)以不同的比例进行共混,采用溶液浇铸的方法得到一系列基膜,然后将其浸泡在三甲胺溶液中进行胺化处理,得到季胺化杂萘联苯聚芳醚酮离子交换膜(QBPPEK/PPEK)。测试了QBPPEK/PPEK的离子交换容量(IEC)、吸水率、溶胀率、面电阻、钒渗透系数和微观结构。随着PPEK含量的增加,QBPPEK/PPEK膜的IEC、吸水率和钒渗透系数减小而面电阻上升。QBPPEK/PPEK膜具有较好的阻钒性能,其电流效率均大于Nafion115。当PPEK含量为10%时,QBPPEK/PPEK膜单电池的能量效率达到88.9%。PPEK的加入可以有效的提高QBPPEK/PPEK膜的氧化稳定性。Blend base membranes(BPPEK/PPEK)were prepared from brominated poly(phthalazinone ether ketone)(BPPEK)with the bromide degree of 0.95 and poly(phthalazinone ether)s(PPEK)by casting solution.Then the base membranes were quaternized and acidized successively to obtain QBPPEK/PPEK membranes.Water uptake,swelling ratio,ion exchange capacity(IEC),vanadium ion permeability,area resistance and microstructure of QBPPEK/PPEK membranes were investigated.The area resistance of QBPPEK/PPEK membranes increased,but ion exchange capacity,water uptake and vanadium ion permeability decreased with an increase in the mass ratio of PPEK.Compared with Nafion115 membrane,QBPPEK/PPEK membranes showed much lower vanadium ion permeability and higher columbic efficiencies.When the content of PPEK reached10%,the energy efficiency of VRB cell with QBPPEK/PPEK membrane was 88.9%.What's more,the introduction of PPEK could improve the oxidative stability of QBPPEK/PPEK membranes.

关 键 词：杂萘联苯聚芳醚酮 共混 季铵化 离子交换膜 钒电池 

分 类 号：O631[理学—高分子化学]