Performance evaluation of an air-breathing high-temperature proton exchange membrane fuel cell

Qixing Wu, Haiyang Li, Wenxiang Yuan, Zhongkuan Luo, Fang Wang, Hongyuan Sun, Xuxin Zhao and Huide Fu

Applied Energy, 2015, vol. 160, issue C, 146-152

Abstract: The air-breathing proton exchange membrane fuel cell (PEMFC) is of great interest in mobile power sources because of its simple system design and low parasitic power consumption. Different from previous low-temperature air-breathing PEMFCs, a high-temperature PEMFC with a phosphoric acid doped polybenzimidazole (PBI) membrane as the polymer electrolyte is designed and investigated under air-breathing conditions. The preliminary results show that a peak power density of 220.5mWcm−2 at 200°C can be achieved without employing any water managements, which is comparable to those with conventional Nafion® membranes operated at low temperatures. In addition, it is found that with the present cell design, the limiting current density arising from the oxygen transfer limitation is around 700mAcm−2 even at 200°C. The short-term durability test at 200mAcm−2 and 180°C reveals that all the cells exhibit a gradual decrease in the voltage along with a rise in the internal resistance. The degradation rate of continuous operation is around 58.32μVh−1, which is much smaller than those of start/stop cycling operations.

Keywords: PEMFC; High temperature; Air breathing; Polybenzimidazole; Phosphoric acid; Durability (search for similar items in EconPapers)
Date: 2015
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (10)

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DOI: 10.1016/j.apenergy.2015.09.042

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