文献类型：会议论文

英文题名：Phosphoric acid-doped organic-inorganic cross-linked sulfonated poly(imide-benzimidazole) for high temperature proton exchange membrane fuel cells

作者：Yue, Zhouying[1];Cai, Yang-Ben[1];Xu, Shiai[1,2]

机构：[1]East China Univ Sci & Technol, Shanghai Key Lab Adv Polymer Mat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, Shanghai 200237, Peoples R China;[2]Qinghai Univ, Chem Engn Coll, Xining 810016, Peoples R China

会议论文集：6th International Renewable Energy Congress (IREC)

会议日期：MAR 24-26, 2015

会议地点：Sousse, TUNISIA

语种：英文

外文关键词：Phosphoric acid-doping; Sulfonated poly(imide benzimidazole); Organic-inorganic cross-linking; Proton exchange membrane

摘要：Silane-cross-linked sulfonated poly(imide benzimidazole) (CSiSPIBI) membranes were prepared using gamma-(2,3-epoxypropoxy) propyltrimethoxysilane (KH560) as a cross-linker, and the cross-linked structure was characterized using Fourier transform infrared spectroscopy and solubility test. The resulted cross-linked membranes were further doped with phosphoric acid (PA) by means of the acid-base interaction with the alkaline imidazole ring and the electrostatic interaction with siloxane. The results show that PA-doped CSiSPIBI membranes have high proton conductivity due to the formation of a new proton transport pathway between PA and sulfonic acid. Under high temperature and low humidity conditions, the proton conductivity of PA-doped sulfonated membranes is one to two orders of magnitude higher than that of non-PA-doped membranes and PA-doped non-sulfonated membranes. The silane-cross-linked membranes display improved chemical stability and mechanical strength, especially the oxidative stability. The complete dissolution time in Fenton's reagent increases from 510 min for the sulfonated polyimide/polybenzimidazole blend membrane to 1450 min for the silane-cross-linked membrane. (C) 2015 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.