Abstract
Visualization inside polymer electrolyte fuel cells (PEFCs) is important for elucidating reaction distributions to improve the performance and durability of the cells. An O2-sensitive porphyrin luminescent dye film was used to visualize oxygen partial pressures and water blockages simultaneously in triple-serpentine gas flow channels in an operating PEFC. Water droplets formed near the exit of a gas-flow channel lowered the oxygen partial pressure noticeably over the channel by blocking air flow near the entrance. Meanwhile, air was continuously supplied from the other channels through the gas diffusion layer, thus allowing power to be generated in the blocked channel. With water blockages, however, the catalyst layer under the channel became flooded by the water produced during the reaction, and the flooded state continued to exist in the catalyst and/or porous layers, even after blowing the water droplet out, so that the power generation was lowered along the channel.
| Original language | English |
|---|---|
| Pages (from-to) | 2635-2639 |
| Number of pages | 5 |
| Journal | Journal of Power Sources |
| Volume | 196 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2011 Mar 1 |
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Keywords
- Flooding
- Fuel Cell
- Gas diffusion layer
- Oxygen partial pressure
- Porphyrin
- Simultaneous visualization
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Energy Engineering and Power Technology
- Renewable Energy, Sustainability and the Environment
- Physical and Theoretical Chemistry
Cite this
Simultaneous visualization of oxygen distribution and water blockages in an operating triple-serpentine polymer electrolyte fuel cell. / Takada, Kenji; Ishigami, Yuta; Inukai, Junji; Nagumo, Yuzo; Takano, Hiroshi; Nishide, Hiroyuki; Watanabe, Masahiro.
In: Journal of Power Sources, Vol. 196, No. 5, 01.03.2011, p. 2635-2639.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Simultaneous visualization of oxygen distribution and water blockages in an operating triple-serpentine polymer electrolyte fuel cell
AU - Takada, Kenji
AU - Ishigami, Yuta
AU - Inukai, Junji
AU - Nagumo, Yuzo
AU - Takano, Hiroshi
AU - Nishide, Hiroyuki
AU - Watanabe, Masahiro
PY - 2011/3/1
Y1 - 2011/3/1
N2 - Visualization inside polymer electrolyte fuel cells (PEFCs) is important for elucidating reaction distributions to improve the performance and durability of the cells. An O2-sensitive porphyrin luminescent dye film was used to visualize oxygen partial pressures and water blockages simultaneously in triple-serpentine gas flow channels in an operating PEFC. Water droplets formed near the exit of a gas-flow channel lowered the oxygen partial pressure noticeably over the channel by blocking air flow near the entrance. Meanwhile, air was continuously supplied from the other channels through the gas diffusion layer, thus allowing power to be generated in the blocked channel. With water blockages, however, the catalyst layer under the channel became flooded by the water produced during the reaction, and the flooded state continued to exist in the catalyst and/or porous layers, even after blowing the water droplet out, so that the power generation was lowered along the channel.
AB - Visualization inside polymer electrolyte fuel cells (PEFCs) is important for elucidating reaction distributions to improve the performance and durability of the cells. An O2-sensitive porphyrin luminescent dye film was used to visualize oxygen partial pressures and water blockages simultaneously in triple-serpentine gas flow channels in an operating PEFC. Water droplets formed near the exit of a gas-flow channel lowered the oxygen partial pressure noticeably over the channel by blocking air flow near the entrance. Meanwhile, air was continuously supplied from the other channels through the gas diffusion layer, thus allowing power to be generated in the blocked channel. With water blockages, however, the catalyst layer under the channel became flooded by the water produced during the reaction, and the flooded state continued to exist in the catalyst and/or porous layers, even after blowing the water droplet out, so that the power generation was lowered along the channel.
KW - Flooding
KW - Fuel Cell
KW - Gas diffusion layer
KW - Oxygen partial pressure
KW - Porphyrin
KW - Simultaneous visualization
UR - http://www.scopus.com/inward/record.url?scp=78650517184&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=78650517184&partnerID=8YFLogxK
U2 - 10.1016/j.jpowsour.2010.10.097
DO - 10.1016/j.jpowsour.2010.10.097
M3 - Article
AN - SCOPUS:78650517184
VL - 196
SP - 2635
EP - 2639
JO - Journal of Power Sources
JF - Journal of Power Sources
SN - 0378-7753
IS - 5
ER -