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  4. Novel structure for passive CO2 degassing in uDMFC
 
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2006
Conference Paper
Titel

Novel structure for passive CO2 degassing in uDMFC

Titel Supplements
Abstract
Abstract
A new flowfield design enabling fully passive CO2-gas bubble removal from the anode of a micro direct methanol fuel cell (DMFC) is presented. The flowfields channels have an upside down T-shaped cross-section with defined opening angles along their axis and cross-section. The angles create an intrinsic transport mechanism removing growing gas bubbles from the electrode by capillary forces only. Applicable opening angles and are 5° and 1.5° respectively. The experimental verification has been done based on a transparent flowfield and by a fully operational DMFC delivering a power density output of up to 8 mW/cm2 without the need of external pumps. Although the fuel cell supply can be operated both passively and pump assisted, the passive operation shows the highest efficiency.
Author(s)
Litterst, C.
Eccarius, S.
Hebling, C.
Zengerle, R.
Koltay, P.
Hauptwerk
MEMS 2006 Istanbul : 19th IEEE International Conference on Micro Electro Mechanical Systems. Technical digest
Konferenz
International Conference on Micro Electro Mechanical Systems (MEMS) 2006
Thumbnail Image
DOI
10.1109/MEMSYS.2006.1627746
Language
English
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