High Proton Conducting SPEEK/SiO_2/ PWA Composite Membranes for Direct Methanol Fuel Cells

作     者：张高文 刘嘉宁 ZHANG Gaowen,JIANG Jiuxin ,LIU Jianing (College of Chemistry and Environment,Hubei University of Technology,Wuhan 430068,China)

作者机构：College of Chemistry and EnvironmentHubei University of Technology 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2011年第26卷第3期

页      面：417-421页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

基　　金：Funded by Ministry of Education  Hubei  China (No.Q20091403) 

主　　题：direct methanol fuel cell sulfonated polyether ether ketone sol gel method PWA SiO2 

摘      要：Sulfonated polyether ether ketone （SPEEK） based composite membranes for direct methanol fuel cell （DMFC） application were prepared by sol-gel reaction of tetraethoxysilane （TEOS） in the SPEEK matrix and the incorporation of phosphotungstic acid （PWA）.The conductivity of the developed membranes was determined by impedance spectroscopy and the methanol permeability through the membranes was obtained from diffuseness *** SEM images show that the addition of SiO2 and the covalent cross-linking structure lead to fine PWA particles and more uniformly *** swelling of composite membranes remains in the range of 5%-8% at 30-90 ℃ and the effusion of PWA reduces *** composite membranes show a good balance in higher proton conductivity and lower methanol *** cell with composite membrane has higher open circuit voltage（0.728 V） and higher peak power density（45 mW/cm2） than that with Nafion117.