期刊
JOURNAL OF POWER SOURCES
卷 283, 期 -, 页码 429-442出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2015.02.145
关键词
Proton exchange membrane fuel cell; Stamped metallic bipolar plate
资金
- Bureau of Energy, Ministry of Economic Affairs of the Republic of China [102-D0108]
This study presents the development of novel proton exchange membrane fuel cells using stamped metallic bipolar plates. To achieve uniformly distributed and low pressure-drop flow fields within fuel cells, a novel bipolar plate with straight channels is designed and verification of a fuel-cell short stack using this bipolar plate is performed. In the experiments, low-temperature and low-humidity operations and high-temperature and high-humidity operations are adopted to evaluate effects of stack temperature and inlet relative humidity on performance at various outlet pressures. Experimental results show that under low-temperature and low-humidity operations, increasing the outlet pressure enhances stack performance and reduces performance differences between various stack temperatures. Under high-temperature and high-humidity operations, stack performance increases with increasing outlet pressures, while the extent of their increase becomes smaller. Compared to low-temperature and low-humidity operations, high-temperature and high-humidity operations have better electrochemical reactions and membrane hydration and, thus, better stack performance. In this study, the operation with a stack temperature of 80 degrees C and outlet pressure of 4 atm produces the best performance of 1100 mA cm(-2) at 0.646 V. (C) 2015 Elsevier B.V. All rights reserved.
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