Effects of cathode channel size and operating conditions on the performance of air-blowing PEMFCs

Bosung Kim, Yongtaek Lee, Ahyoung Woo and Yongchan Kim

Applied Energy, 2013, vol. 111, issue C, 448 pages

Abstract: Air-blowing proton exchange membrane fuel cells (PEMFCs) have been developed as a potential new power source for portable electronic devices. However, air-blowing PEMFCs show lower performance than compressed-air PEMFCs because of their adverse operating conditions. In this study, the effects of the cathode channel size and operating conditions on the performance of the air-blowing PEMFC were analyzed. At the normal operating temperature, the performance of the air-blowing PEMFC improved with the decrease in the cathode channel size. However, at a low operating temperature and low fan voltage, massive flooding limits the decrease in the cathode channel size. In addition, water management in the air-blowing PEMFC was investigated by analyzing ohmic resistance. The transition current density between the humidification and the flooding region decreased with decreasing cathode channel size and operating temperature.

Keywords: Air-blowing PEMFC; Cathode channel size; Cell performance; Water management; Operation region (search for similar items in EconPapers)
Date: 2013
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Citations: View citations in EconPapers (16)

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DOI: 10.1016/j.apenergy.2013.04.091

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