Design of a MEA with multi-layer electrodes for high concentration methanol DMFCs

被引：43

作者：

Park, Young-Chul ^{[1
]}

Kim, Dong-Hwi ^{[1
,2
]}

Lim, Seongyop ^{[1
,2
]}

Kim, Sang-Kyung ^{[1
,2
]}

Peck, Dong-Hyun ^{[1
]}

Jung, Doo-Hwan ^{[1
,2
]}

机构：

[1] KIER, Taejon 305343, South Korea

[2] UST, Taejon, South Korea

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2012年 / 37卷 / 05期

关键词：

Passive direct methanol fuel cell; High concentration methanol operation; Methanol crossover; Water crossover; Cell performance; FUEL-CELL; WATER CROSSOVER; DIFFUSION LAYER; PERFORMANCE; OPTIMIZATION; PARAMETERS; THICKNESS; CATHODE;

D O I：

10.1016/j.ijhydene.2011.04.112

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：

According to the conventional MEA test, methanol and water crossover are the main factors to determine performance of a passive DMFC. Thus, to ensure the high cell performance of a passive DMFC using high concentration methanol of 50-95 vol%, the MEA in this study introduces the barrier layer to limit the crossover of high concentration methanol, a hydrophobic layer to reduce water crossover, and a hydrophilic layer to enhance the water recovery from the cathode to the anode. The functional layers of the MEA have the effect of improving the performance of the passive DMFC by decreasing the methanol and water crossover. In spite of the operation with 95 vol% methanol, the MEA with multi-layer electrodes for high concentration methanol DMFCs shows a maximum power density of 35.1 mW cm(-2) and maintains a high power density of 30 mW cm(-2) (0.405 V) under constant current operation. Copyright (C) 2011, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：4717 / 4727

页数：11

共 40 条

[1] DMFC employing a porous plate for an efficient operation at high methanol concentrations [J].