Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5147847 | International Journal of Hydrogen Energy | 2017 | 13 Pages |
Abstract
A passive, air-breathing, 6-cell direct methanol fuel cell (DMFC) stack is designed, fabricated and tested based on the performance of a passive single-cell DMFC. A large methanol reservoir in a hexagonal shape is considered in designing the stack in order to increase the DMFC operation time without any interruption, i.e., to refill the methanol solution. Hence, the ratio of methanol solution volume in the reservoir for the single cell, i.e., 8Â ml, and hexagonal stack, i.e., 240Â ml, is 1:30. The power output of 500Â mW is achieved at 1.5Â V using a 5Â M methanol solution at room temperature. With a large volume of methanol, i.e., 240Â ml of 5Â M methanol in the hexagonal stack, it can be operated continuously at 1.5Â V for more than 40Â h, whereas for a small volume, i.e., 8Â ml in a single cell, the operation can reach only 3Â h-4Â h with a similar reduction of 25% from the initial power output. Moreover, the DMFC stack is used for long-term operation more than 3000Â h, and the morphology of MEA is analyzed.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Mohd Shahbudin Masdar, Dedikarni Dedikarni, Azran Mohd Zainoodin, Masli Irwan Rosli, Siti Kartom Kamarudin, Wan Ramli Wan Daud,