Phosphoric acid doped membranes based on Nafion®, PBI and their blends - Membrane preparation, characterization and steam electrolysis testing
Phosphoric acid doped membranes based on Nafion®, PBI and their blends - Membrane preparation, characterization and steam electrolysis testing
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DOI：
10.1016/j.ijhydene.2011.03.058
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发表时间：
2011-06-01
影响因子：
7.2
通讯作者：
Bjerrum, Niels J.
中科院分区：
文献类型：
--
作者：
Aili, David;Hansen, Martin Kalmar;Bjerrum, Niels J.
从热力学、动力学和工程学的角度来看，在100℃以上的温度下进行质子交换膜蒸汽电解具有若干优势。这项技术的一种关键材料是高温质子交换膜。在这项工作中，开发了一种制备全氟磺酸（Nafion®）和聚苯并咪唑共混膜的新方法。制备了涵盖整个组成范围的均质二元膜，并针对化学和物理化学性质（如水吸收、磷酸掺杂、氧化稳定性、机械强度和质子传导性）进行了表征。一种基于磷酸掺杂的全氟磺酸（Nafion®）的膜电极组件（MEA）在130℃、环境压力下运行，在1.75 V时电流密度为300 mA/cm²，在90小时的测试过程中未观察到膜的降解。基于聚苯并咪唑（PBI）的膜电极组件显示出更好的极化曲线（在1.75 V时为500 mA/cm²），但耐久性较差。版权所有（c）2011，氢能出版有限责任公司。由爱思唯尔有限公司出版。保留所有权利。
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.