The performance of a novel pseudo-bipolar bi-cell piezoelectric proton exchange membrane fuel cell with a smaller nozzle and diffuser
Resource
JOURNAL OF POWER SOURCES, 196(18), 7564-7571
Journal
Journal of Power Sources
Pages
7564-7571
Date Issued
2011
Date
2011
Author(s)
Ma, Hsiao-Kang
Wang, Jyun-Sheng
Su, Wei-Han
Cheng, Wei-Yang
Abstract
Previous studies of a bi-cell piezoelectric proton exchange membrane fuel cell with a nozzle and diffuser (PZT-PEMFC-ND bi-cell), using a novel pseudo-bipolar design, have shown that the performance of the bi-cell could be 1.6 times greater than that of the single cell. In this study, this novel design, using a reduced nozzle and diffuser, contains two cells with two outside anodes and two inside cathodes that share a common PZT vibrating device for pumping air flow. The results show that the bi-cell should be operated with a larger stoichiometric ratio of 1.5 and a cell temperature of 50°C to prevent concentration loss. Furthermore, the performance of the bi-cell using one degraded membrane electrode assembly (MEA) and one normal MEA is investigated to understand the current flow characteristic of the bi-cell. Although an internal current is observed, the bi-cell can still deliver a non-negative power. This finding will help reinforce the viability of using a PZT-PEMFC-ND bi-cell for future stack designs. Moreover, the power consumption of the PZT device is temperature-dependant and this should be taken into consideration when determining the net power of the PZT-PEMFC-ND bi-cell. The maximum net power of the bi-cell is found to be 0.7 W. © 2010 Elsevier B.V. All rights reserved.
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Type
journal article
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