Poly(ether ether ketone ketone) based imidazolium as anion exchange membranes for alkaline fuel cells  

作　　者：Tiantian Li Xuemei Wu Wanting Chen Xiaoming Yan Dongxing Zhen Xue Gong Jiafei Liu Shaofeng Zhang Gaohong He 

机构地区：[1]State Key Laboratory of Fine Chemicals, Research and Development Center of Membrane Science and Technology, School of Chemical Engineering, Dalian University of Technology, Dalian 116024, China [2]School of Petroleum and Chemical engineering, State Key Laboratory of Fine Chemicals, Research and Development Center of Membrane Science and Technology, Dalian University of Technology, Panjin 124221, China

出　　处：《Chinese Journal of Chemical Engineering》2018年第10期2130-2138,共9页中国化学工程学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China(21706023,21476044,21406031);the National Key Research and Development Program of China(2016YFB0101203);Education Department of Liaoning Province of China(LT2015007);Fundamental Research Funds for the Central Universities(DUT16TD19);the Changjiang Scholars Program(T2012049)

摘　　要：An imidazolium functionalized poly(ether ether ketone ketone)(PEEKK-DIm OH)anion exchange membrane(AEM)readily soluble in certain low-boiling-point solvents(isopropanol)is prepared.The solubility results are consistent with the results of molecular dynamics simulations.By varying the chloromethylation reaction temperature or concentrated sulfuric acid concentration of PEEKK,the degrees of chloromethylation of PEEKK are changed from 54% to 92%,the corresponding PEEKK-DIm OH AEMs with the ion exchange capacities(IECs)of 1.14–1.65 mmol·g^(-1).The PEEKK-DIm OH 92% AEM shows high hydroxide conductivity(31 m S·cm^(-1)),suitable water uptake(94%)and acceptable swelling ratio(39%)at 60°C.In addition,the PEEKK-DIm OH AEMs possess good thermal and alkaline stability.The maximum power density(46.16 mW·cm^(-2))of fuel cell prepared with PEEKK-DIm OH 92%AEM as exchange membrane and ionomer is much higher than that with commercial AHA membranes.All the above results indicate that the PEEKK used in this study is a promising AEM matrix material for alkaline fuel cells.An imidazolium functionalized poly（ether ether ketone ketone）（PEEKK-DIm OH）anion exchange membrane（AEM）readily soluble in certain low-boiling-point solvents（isopropanol）is prepared.The solubility results are consistent with the results of molecular dynamics simulations.By varying the chloromethylation reaction temperature or concentrated sulfuric acid concentration of PEEKK,the degrees of chloromethylation of PEEKK are changed from 54% to 92%,the corresponding PEEKK-DIm OH AEMs with the ion exchange capacities（IECs）of 1.14–1.65 mmol·g-1.The PEEKK-DIm OH 92% AEM shows high hydroxide conductivity（31 m S·cm-1）,suitable water uptake（94%）and acceptable swelling ratio（39%）at 60°C.In addition,the PEEKK-DIm OH AEMs possess good thermal and alkaline stability.The maximum power density（46.16 mW·cm-2）of fuel cell prepared with PEEKK-DIm OH 92%AEM as exchange membrane and ionomer is much higher than that with commercial AHA membranes.All the above results indicate that the PEEKK used in this study is a promising AEM matrix material for alkaline fuel cells.

关 键 词：Poly （ether ether ketone ketone） Membranes SOLUBILITY IONOMER 1 2-Dimethylimidazole Fuel cells 

分 类 号：TQ425.236[化学工程] TM911.4[电气工程—电力电子与电力传动]