Development of shut-down process for a proton exchange membrane fuel cell

Several different shut-down procedures were carried out to reduce the degradation of membrane electrode assembly (MEA) in a proton exchange membrane fuel cell (PEMFC). The effects of close/open state of outlets of a single cell and application of a dummy load during the shut-down on the degradation...

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Veröffentlicht in:Journal of power sources 2008-06, Vol.180 (2), p.814-820
Hauptverfasser: Kim, Hyoung-Juhn, Lim, Sang Jin, Lee, Jeung Woo, Min, In-Gyu, Lee, Sang-Yeop, Cho, EunAe, Oh, In-Hwan, Lee, Jong Hyun, Oh, Seung-Chan, Lim, Tae-Won, Lim, Tae-Hoon
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Sprache:eng
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Zusammenfassung:Several different shut-down procedures were carried out to reduce the degradation of membrane electrode assembly (MEA) in a proton exchange membrane fuel cell (PEMFC). The effects of close/open state of outlets of a single cell and application of a dummy load during the shut-down on the degradation of the MEA were investigated. Also, we elucidated the relationship between the thickness of the electrolyte membrane and the degradation of the MEA for different shut-down procedures. When a thin electrolyte membrane was used, the closer of outlets mitigated the degradation during on/off operation. For the thicker electrolyte membrane, the dummy load which eliminates residual hydrogen and oxygen in the electrodes should be applied to lower the degradation.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2007.12.112