Phosphoric acid doped membranes based on Nafion®, PBI and their blends - Membrane preparation, characterization and steam electrolysis testing

被引：128

作者：

Aili, David ^{[1
]}

Hansen, Martin Kalmar ^{[1
]}

Pan, Chao ^{[1
]}

Li, Qingfeng ^{[1
]}

Christensen, Erik ^{[1
]}

Jensen, Jens Oluf ^{[1
]}

Bjerrum, Niels J. ^{[1
]}

机构：

[1] Tech Univ Denmark, Dept Chem, DK-2800 Lyngby, Denmark

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2011年 / 36卷 / 12期

关键词：

Proton exchange membranes; Nafion (R); Polybenzimidazole; Phosphoric acid; Steam electrolysis; HIGH-TEMPERATURE OPERATION; FUEL-CELL APPLICATIONS; POLYMER ELECTROLYTE; POLYBENZIMIDAZOLE MEMBRANES; COMPOSITE MEMBRANES; WATER ELECTROLYSIS; IONOMER; 100-DEGREES-C; CONDUCTIVITY; PERFORMANCE;

D O I：

10.1016/j.ijhydene.2011.03.058

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：

Proton exchange membrane steam electrolysis at temperatures above 100 degrees C has several advantages from thermodynamic, kinetic and engineering points of view. A key material for this technology is the high temperature proton exchange membrane. In this work a novel procedure for preparation of Nafion (R) and polybenzimidazole blend membranes was developed. Homogeneous binary membranes covering the whole composition range were prepared and characterized with respect to chemical and physiochemical properties such as water uptake, phosphoric acid doping, oxidative stability, mechanical strength and proton conductivity. An MEA based on phosphoric acid doped Nafion (R) was operated at 130 degrees C at ambient pressure with a current density of 300 mA cm(-2) at 1.75 V, with no membrane degradation observed during a test of 90 h. The PBI based MEAs showed better polarization curves (500 mA cm(-2) at 1.75 V) but poor durability. Copyright (c) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：6985 / 6993

页数：9

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