Fluorinated poly(p-triphenylene isatin)anion exchange membranes based on hydrophilic hydroxyl side chain modulation for fuel cells  

作　　者：Yiman Gu Yanchao Zhang Zhanyu Li Yijia Lei Baozeng Sun Xiaoyu Yu Zhe Wang 

机构地区：[1]College of Chemistry and Life Science,Changchun University of Technology,Changchun 130012,Jilin,China [2]College of Chemical Engineering,Changchun University of Technology,Changchun 130012,Jilin,China [3]School of Materials Science and Engineering,Changchun University of Technology,Changchun 130012,Jilin,China [4]Key Laboratory of Advanced Functional Polymer Membrane Materials of Jilin Province,Changchun 130012,Jilin,China

出　　处：《Journal of Energy Chemistry》2025年第1期702-709,共8页能源化学(英文版)

基　　金：Natural Science Foundation of China(grant nos 22075031);Jilin Provincial Science&Technology Department(grant nos 20220201105GX);Jilin Provincial Development and Reform Commission(grant nos 2023C034-4)。

摘　　要：The development of alkaline fuel cells is moving forward at an accelerated pace,and the application of ether-free bonded polymers to anion exchange membranes(AEMs)has been widely investigated.However,the question of the“trade-off”between AEM ionic conductivity and dimensional stability remains difficult.The strategy of inducing microphase separation to improve the performance of AEM has attracted much attention recently,but the design of optimal molecular structures is still being explored.Here,this work introduced different ratios of 3-bromo-1,1,1-trifluoroacetone(x=40,50,and 60)into the main chain of poly(p-terphenylene isatin).Because fluorinated groups have excellent hydrophobicity,hydrophilic hydroxyl-containing side chains are introduced to jointly adjust the formation of phase separation structure.The results show that PTI-PTF_(50)-NOH AEM with the appropriate fluorinated group ratio has the best ionic conductivity and alkali stability under the combined effect of both.It has an ionic conductivity of 133.83 mS cm^(-1)at 80°C.In addition,the OH-conductivity remains at 89%of the initial value at 80°C and 3 M KOH for 1056 h of immersion.The cell polarization curve based on PTI-PTF_(50)-NOH shows a power density of 734.76 mW cm^(-2)at a current density of 1807.7 mA cm^(-2).

关 键 词：Anion exchange membranes Poly(p-terphenylene isatin) Hydrophilic-hydrophobic phase separation Fluorinated group 

分 类 号：O63[理学—高分子化学]