Ethyl phosphoric acid grafted amino-modified polybenzimidazole with improved long-term stability for high-temperature proton exchange membrane applications

被引：52
|
作者：
Wang, Di [1 ]
Wang, Shuang [1 ,2 ,3 ]
Tian, Xue [1 ]
Li, Jinsheng [1 ]
Liu, Fengxiang [1 ]
Wang, Xu [1 ]
Chen, Hao [1 ]
Mao, Tiejun [1 ]
Liu, Geng [1 ]
机构：
[1] Changchun Univ Technol, Coll Chem Engn, Changchun 130012, Peoples R China
[2] Changchun Univ Technol, Adv Inst Mat Sci, Changchun 130012, Peoples R China
[3] Harvard Univ, Dept Phys, Sch Engn & Appl Sci, 29 Oxford St, Cambridge, MA 02138 USA
来源：
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2020年 / 45卷 / 04期
关键词：
Amino-modified polybenzimidazole; Ethyl phosphoric acid; Graft; Phosphoric acid doping; Long-term stability; POLY(ARYLENE ETHER SULFONE)S; CROSS-LINKED MEMBRANES; FUEL-CELL APPLICATIONS; SULFONATED POLYBENZIMIDAZOLE; IONIC LIQUID; CONDUCTIVITY; CATIONS; PEMFC; PBI;
D O I：
10.1016/j.ijhydene.2019.11.219
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A series of membranes based on amino-modified polybenzimidazole with grafted ethyl phosphonic acid have been successfully prepared. Firstly, the amino-modified polybenzimidazole (PBI-NH2-X) was synthesized, then the ethyl phosphoric acid (EPA) were grafted on to PBI-NH2-X to obtained amino-modified polybenzimidazoles with grafted ethyl phosphonic acid groups (PBI-NH2-EPA-X). EPA is introduced into the matrix to improve the H3PO4 doping level and proton conductivity of the membranes. The obtained membranes display good dimensional and thermal stability. Long-term stability of the grafted membranes is much better than the pristine PBI membranes. Moreover, PBI-NH2-EPA-15 shows a proton conductivity of 0.062 S cm(-1) at 170 degrees C, which is 342% higher than that of PBI. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
引用
收藏
页码：3176 / 3185
页数：10
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