An Approach to Measure the Water Breakthrough in Porous Carbon Materials

被引：2

作者：

Schwager, M. ^{[1
]}

Dhanushkodi, S. R. ^{[2
]}

Merida, W. ^{[2
]}

机构：

[1] Univ British Columbia, Dept Mech Engn, Vancouver, BC V6T 1Z4, Canada

[2] Univ British Columbia, Clean Energy Res Ctr, Vancouver, BC V6T 1Z4, Canada

来源：

ECS ELECTROCHEMISTRY LETTERS | 2015年 / 4卷 / 04期

关键词：

MEMBRANE FUEL-CELLS; GAS-DIFFUSION LAYERS; LIQUID WATER; MICROPOROUS LAYER; PERFORMANCE LOSS; TRANSPORT; PEMFC; PRESSURE; VISUALIZATION; DURABILITY;

D O I：

10.1149/2.0071504eel

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

We report a new characterization method that detects liquid water breakthrough in porous materials by measuring changes in relative humidity and electrochemical impedance simultaneously. Unlike previous work based on capillary pressure, a four-chamber tool was developed to monitor the pressure and dew point temperature across porous transport layer materials. This approach can characterize the structure and water transport behavior of carbonaceous materials for polymer electrolyte fuel cells and electrolyzers. The changes in the dew point, impedance, and pressure provide a reliable and fast indicator to predict the liquid water breakthrough. (C) 2015 The Electrochemical Society.

引用

页码：F32 / F34

页数：3

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