Sulfonated polybenzimidazole/amine functionalized titanium dioxide(s PBI/AFT) composite electrolyte membranes for high temperature proton exchange membrane fuel cells usage  

作　　者：Muhammad AImran Tiantian Li Xuemei Wu Xiaoming Yan Abdul-Sammed Khan 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 Physics,Dalian University of Technology,Dalian 116024,China

出　　处：《Chinese Journal of Chemical Engineering》2020年第9期2425-2437,共13页中国化学工程学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(Nos.21776034,21476044 and 21406031);Joint Funds of the National Natural Science Foundation of China(U1663223);National Key Research and Development Program of China(2016YFB0101203);Changjiang Scholars Program(T2012049)。

摘　　要：The novel sulfonated polybenzimidazole(sPBI)/amine functionalized titanium dioxide(AFT) composite membrane is devised and studied for its capability of the application of high temperature proton exchange membrane fuel cells(HT-PEMFCs),unlike the prior low temperature AFT endeavors.The high temperature compatibility was actualized because of the filling of free volumes in the rigid aromatic matrix of the composite with AFT nanoparticles which inhibited segmental motions of the chains and improved its thermal stability.Besides,amine functionalization of TiO2 enhanced their dispersion character in the sPBI matrix and shortened the interparticle separation gap which finally improved the proton transfer after establishing interconnected pathways and breeding more phosphoric acid(PA) doping.In addition,the appeared assembled clusters of AFT flourished a superior mechanical stability.Thus,the optimized sPBI/AFT(10 wt%) showed 65.3 MPa tensile strength;0.084 S·cm^-1 proton conductivity(at 160℃;in anhydrous conditions),28.6% water uptake and PA doping level of 23 mol per sPBI repeat unit.The maximum power density peak for sPBI/AFT-10 met the figure of0.42 W·cm^-2 at 160℃(in dry conditions) under atmospheric pressure with 1.5 and 2.5 stoichiometric flow rates of H2/air.These results affirmed the probable fitting of sPBI/AFT composite for HT-PEMFC applications.

关 键 词：Sulfonated polybenzimidazole Titanium dioxide High temperature fuel cells Proton exchange membrane LEACHING AGGLOMERATION Polymerization 

分 类 号：TM911.4[电气工程—电力电子与电力传动] TB383.2[一般工业技术—材料科学与工程]