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

被引：56

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

页码：3176 / 3185

页数：10

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