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- Title
Experimental investigation on the performance and durability of hydrogen AEMFC with electrochemical impedance spectroscopy.
- Authors
Xie, Xu; Zhou, Jiaxun; Wu, Siyuan; Park, Jae Wan; Jiao, Kui
- Abstract
Summary: In situ experimental tests and scanning electron microscope (SEM) observations are done to explore the impact of geometry structure and operating conditions on the performance and durability of alkaline electrolyte membrane fuel cell (AEMFC) accompanied by electrochemical diagnosis. The results show that low anode and cathode polarization resistances can be achieved by selecting a proper ionomer mass fraction (IMF) of the catalyst layer (CL). Increasing the IMF can improve the tolerance to inlet gas humidity. The presence of the anode microporous layer (MPL) greatly improves the cell performance, but cathode MPL plays a reverse effect. After the durability test, the homogeneity of CL is seriously deformed, leading to a great increment of anode and cathode polarization resistances, verified by the electrochemical impedance spectroscopy (EIS) and SEM results. An enhancement of fuel cell durability is achieved by adding nanoscale polytetrafluoroethylene (PTFE) into CL. This work can provide some guidance for the structural and operating parameter optimization of the AEMFC researches in the future. Experimental tests are conducted to study the effect of electrode designs of AEMFC.Proper electrolyte content and inserting anode MPL are favorable.Bad CL stability and Pt agglomeration affect the AEMFC durability, especially in anode.Adding PTFE into CL provides further guidance on the AEMFC durability.
- Subjects
INTERNATIONAL Monetary Fund; SCANNING electron microscopes; FUEL cell electrolytes; DURABILITY; IMPEDANCE spectroscopy; ALKALINE fuel cells; PROTON exchange membrane fuel cells; FUEL cells; IMPACT craters
- Publication
International Journal of Energy Research, 2019, Vol 43, Issue 14, p8522
- ISSN
0363-907X
- Publication type
Article
- DOI
10.1002/er.4851