Application of metal foams to high temperature PEM fuel cells

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題名:	Application of metal foams to high temperature PEM fuel cells
作者:	曾重仁;Tseng, Chung-Jen;Heush, Ying-Jui;Chiang, Chien-Jui;Lee, Yi-Hsuan;Lee, Kan-Rong
貢獻者:	工學院能源工程研究所
關鍵詞:	AC impedance analysis;Metal foam flow field;Proton exchange membrane fuel cell
日期:	2016-09-28
上傳時間:	2026-04-23 11:56:37 (UTC+8)
出版者:	Elsevier Ltd.;Elsevier Ltd
摘要:	摘要： The performance of a high temperature proton exchange membrane fuel cell (HT-PEMFC) with metal foam as the flow field is investigated. The HT-PEMFC is assembled using commercial membrane electrode assembly, Advent TPS® HT PEM MEA. In addition to metal foam flow field, conventional graphite serpentine flow is also used to assemble a single cell using the same MEA for comparison. Effects of operating temperature, stoichiometry, gas preheating temperature, and humidification on cell performance are investigated. AC impedance analysis is also used to study the changes in various resistances and electrochemical mechanisms inside the cell. Results show that metal foam flow field, having high gas permeability, improves gas convection and diffusion, and increases the chance of reaction with the catalysts. The porous structure of metal foam can effectively reduce the contact resistance between the flow plate and carbon paper. The current density at 0.6 V of metal foam fuel cell is approximately 20% higher than conventional graphite serpentine flow channel fuel cell. Increasing the operating temperature, stoichiometry, or humidification, improves the cell performance. Initial 300 h operation test shows the cell is relatively stable. •Metal foam flow field is applied to HT-PEM fuel cell.•Metal foam cell's performance is 20% better than conventional cell.•Low air stoichiometry suffices for stable operation.•Effects of operating parameters are investigated. 出版者： Elsevier Ltd 出版日期： 2016-09-28 出處： International journal of hydrogen energy, 2016-09, Vol.41 (36), p.16196-16204 資源來源： Elsevier ScienceDirect Journals Complete 版權： 2016 Hydrogen Energy Publications LLC 識別號： ISSN: 0360-3199 識別號： EISSN: 1879-3487 識別號： DOI: 10.1016/j.ijhydene.2016.06.149
顯示於類別:	[能源工程研究所 ] 期刊論文

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