On the consequences of methanol crossover in passive air-breathing direct methanol fuel cells

被引：82
作者：
Kho, BK [1 ]
Bae, B [1 ]
Scibioh, MA [1 ]
Lee, J [1 ]
Ha, HY [1 ]
机构：
[1] Korea Inst Sci & Technol, Fuel Cell Res Ctr, Seoul 136791, South Korea
来源：
JOURNAL OF POWER SOURCES | 2005年 / 142卷 / 1-2期
关键词：
passive DMFC; air-breathing; methanol crossover; open circuit voltage; cell temperature;
D O I：
10.1016/j.jpowsour.2004.10.027
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：
Passive direct methanol fuel cells (DMFC) are under development for use in portable power applications due to their enhanced energy density in comparison with active DMFCs. This study has been carried out to understand the unique properties of passive DMFCs, focusing on the internal temperature and the open circuit voltage (OCV), which change as a consequence of the methanol crossover phenomenon. The changes found in the passive DMFCs were very different from active ones because of different reactants supplying conditions. Methanol concentration in the built-in reservoir attached to the anode changed with time on stream and the OCV and the temperature changed correspondingly. Various experiments were conducted to show the unique properties of passive DMFCs at controlled conditions and configurations of the cell. (c) 2004 Elsevier B.V. All rights reserved.
引用
收藏
页码：50 / 55
页数：6
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