A comparison of direct methanol fuel cell degradation under different modes of operation

被引：14

作者：

Wongyao, Nutthapon ^{[1
]}

Therdthianwong, Apichai ^{[2
]}

Therdthianwong, Supaporn ^{[3
]}

Kumar, S. M. Senthil ^{[4
]}

Scott, Keith ^{[4
]}

机构：

[1] King Mongkuts Univ Technol Thonburi, Joint Grad Sch Energy & Environm, Bangkok 10140, Thailand

[2] King Mongkuts Univ Technol Thonburi, PDTI, Fuel Cells & Hydrogen Res & Engn Ctr, Bangkok 10140, Thailand

[3] King Mongkuts Univ Technol Thonburi, Fac Engn, Dept Chem Engn, Bangkok 10140, Thailand

[4] Newcastle Univ, Sch Chem Engn & Adv Mat, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2013年 / 38卷 / 22期

关键词：

Direct methanol fuel cell; Variable load on-off operation mode; Constant load continuous operation mode; Cell performance loss; Methanol crossover; Ru dissolution; PERFORMANCE DEGRADATION; DMFC; DEPENDENCE; CATALYSTS; MEMBRANE; PTRU/C; ANODE; BLACK;

D O I：

10.1016/j.ijhydene.2012.07.058

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：

The degradation test of direct methanol fuel cells (DMFCs) under on-off operation with variable load profile, known as a variable load on-off operation (VLOO) mode, was compared to continuous operation with a constant load, known as a constant load continuous operation (CLCO) mode. It was found that the performance loss in the VLOO mode was higher than that under the CLCO mode in terms of open circuit voltage drop (3.6 times higher) and the maximum power density reduction rate (1.23 times greater). Under both operation modes, the anode catalyst was deteriorated by Ru dissolution. However, the faster decay of cell performance under VLOO mode was mainly caused by the increase of cathode polarization due to higher methanol crossover and the decrease of Pt activity to the oxygen reduction reaction induced by Ru deposition. Copyright (C) 2012, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.

引用

页码：9464 / 9473

页数：10

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