Abstract
An 8-cell air-breathing direct methanol fuel cell (DMFC) stack with the active area of 5 cm2 of each cell has been developed. Stainless steel plates of 500 μm thickness with flow channels were fabricated using photochemical etching method as the current collectors. Different conditioning methods for membrane electrode assembly (MEA) activation were discussed. With proper control of water crossover to the cathode, cathode flooding was avoided in the DMFC stack. Methanol crossover at open circuit voltage (OCV) in the air-breathing DMFC was measured. Further, it was found that flow maldistribution might occur in the parallel flow field of the stack, making carbon dioxide gas management at the anode necessary. Using humidified hydrogen in the anode with a high flow rate, the oxygen transport limiting current density was characterized and found to be sufficient in the air-breathing cathode. The stack produced a maximum output power of 1.33 W at 2.21 V at room temperature, corresponding to a power density of 33.3 mW cm-2.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 1041-1050 |
| Number of pages | 10 |
| Journal | International Journal of Energy Research |
| Volume | 29 |
| Issue number | 12 |
| DOIs | |
| State | Published - Oct 10 2005 |
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All Science Journal Classification (ASJC) codes
- Renewable Energy, Sustainability and the Environment
- Nuclear Energy and Engineering
- Fuel Technology
- Energy Engineering and Power Technology
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On mass transport in an air-breathing DMFC stack. / Lu, G. Q.; Lim, P. C.; Liu, F. Q.; Wang, Chao Yang.
In: International Journal of Energy Research, Vol. 29, No. 12, 10.10.2005, p. 1041-1050.Research output: Contribution to journal › Article
TY - JOUR
T1 - On mass transport in an air-breathing DMFC stack
AU - Lu, G. Q.
AU - Lim, P. C.
AU - Liu, F. Q.
AU - Wang, Chao Yang
PY - 2005/10/10
Y1 - 2005/10/10
N2 - An 8-cell air-breathing direct methanol fuel cell (DMFC) stack with the active area of 5 cm2 of each cell has been developed. Stainless steel plates of 500 μm thickness with flow channels were fabricated using photochemical etching method as the current collectors. Different conditioning methods for membrane electrode assembly (MEA) activation were discussed. With proper control of water crossover to the cathode, cathode flooding was avoided in the DMFC stack. Methanol crossover at open circuit voltage (OCV) in the air-breathing DMFC was measured. Further, it was found that flow maldistribution might occur in the parallel flow field of the stack, making carbon dioxide gas management at the anode necessary. Using humidified hydrogen in the anode with a high flow rate, the oxygen transport limiting current density was characterized and found to be sufficient in the air-breathing cathode. The stack produced a maximum output power of 1.33 W at 2.21 V at room temperature, corresponding to a power density of 33.3 mW cm-2.
AB - An 8-cell air-breathing direct methanol fuel cell (DMFC) stack with the active area of 5 cm2 of each cell has been developed. Stainless steel plates of 500 μm thickness with flow channels were fabricated using photochemical etching method as the current collectors. Different conditioning methods for membrane electrode assembly (MEA) activation were discussed. With proper control of water crossover to the cathode, cathode flooding was avoided in the DMFC stack. Methanol crossover at open circuit voltage (OCV) in the air-breathing DMFC was measured. Further, it was found that flow maldistribution might occur in the parallel flow field of the stack, making carbon dioxide gas management at the anode necessary. Using humidified hydrogen in the anode with a high flow rate, the oxygen transport limiting current density was characterized and found to be sufficient in the air-breathing cathode. The stack produced a maximum output power of 1.33 W at 2.21 V at room temperature, corresponding to a power density of 33.3 mW cm-2.
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U2 - 10.1002/er.1138
DO - 10.1002/er.1138
M3 - Article
AN - SCOPUS:26444569436
VL - 29
SP - 1041
EP - 1050
JO - International Journal of Energy Research
JF - International Journal of Energy Research
SN - 0363-907X
IS - 12
ER -