In this experiment, we are going to discuss the possibility of zero methanol crossover to the cathode target within the capacity of DMFC electrode and with proper methanol supply.
After various trials, it is found that electrospray can be used to reduce fuel demand. The methanol will be consumed immediately within the electrode capacity. The methanol solution is volatile. As a result, the actual amount of electricity generated will never accord with the input. If we supply the electrode with methanol by direct contact using infusion pump, the volatility will be reduced. The total power generated then accords with the amount of methanol input. Although only low methanol concentration is supported currently, it¡¦s hoped that the crossover problem can be solved completely. In the electrode design, we try to take away the carbon cloth from the anode and leave the catalyst layer. By this way, the methanol is in touch with the catalyst. Such change is good for this experiment.
In our study, following difficulties are found:
(1) Methanol input
(2) The impact of volatility in electrospray
(3) When supplying fuels to the surface of electrode, the reaction size is too small.
More attentions should be paid in the future cell design.
| Identifer | oai:union.ndltd.org:NSYSU/oai:NSYSU:etd-0909108-211055 |
| Date | 09 September 2008 |
| Creators | Lai, Jhih-jia |
| Contributors | Chien-Hsiang Chao, Peng-Sheng Wei, Shyng-Her Lin, Ming-San Lee, Long-Jeng Chen |
| Publisher | NSYSU |
| Source Sets | NSYSU Electronic Thesis and Dissertation Archive |
| Language | Cholon |
| Detected Language | English |
| Type | text |
| Format | application/pdf |
| Source | http://etd.lib.nsysu.edu.tw/ETD-db/ETD-search/view_etd?URN=etd-0909108-211055 |
| Rights | not_available, Copyright information available at source archive |
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