화학공학소재연구정보센터
Journal of the Electrochemical Society, Vol.162, No.4, F373-F379, 2015
Effect of Chloride on PEFCs in Presence of Various Cations
The performance and durability of Polymer electrolyte fuel cells (PEFCs) were investigated by separately introducing HCl and five different chloride salts (AlCl3, FeCl3, CrCl3, NiCl2, and MgCl2) into the air stream of an operating fuel cell. Under the same operating conditions and at a fixed chloride (Cl-) concentration of 50 ppm in air stream, it appeared that HCl affected the cell performance faster than the other chloride salts, therefore the presence of the cation in the contaminant solutions slowed and/or reduced the decrease in the cell performance. The overall cell performance degradation was ranked as HCl, AlCl3 > FeCl3 > CrCl3 > NiCl2, MgCl2. The performance degradation is believed to be due to the adsorption of chloride on the Pt surface reducing active surface area. At lower relative humidity, the contaminant concentration increased in liquid phase and salt precipitated eventually blocking some of the flow channels and the GDL surface and resulted in even lower cell performance. (C) The Author(s) 2015. Published by ECS. This is an open access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives 4.0 License (CC BY-NC-ND, http://creativecommons.org/licenses/by-nc-nd/4.0/), which permits non-commercial reuse, distribution, and reproduction in any medium, provided the original work is not changed in any way and is properly cited. For permission for commercial reuse, please email: oa@electrochem.org. All rights reserved.