Distributed effects of calcium ion contaminant on polymer electrolyte fuel cell performance

JOURNAL OF POWER SOURCES

卷:296

Article

Uddin, Md Aman^1,2  Wang, Xiaofeng^2,3  Park, Jaehyung^1,2  Pasaogullari, Ugur^1,2  Bonville, Leonard² 

[1] Univ Connecticut, Dept Mech Engn, Storrs, CT 06269 USA

[2] Univ Connecticut, Ctr Clean Energy Engn, Storrs, CT 06269 USA

[3] Univ Connecticut, Dept Mat Sci & Engn, Storrs, CT 06269 USA

关键词: Polymer electrolyte fuel cell;    Cation contamination;    Air impurities;    Segmented cell;   

DOI  :  10.1016/j.jpowsour.2015.07.020

来源: Elsevier

【 摘 要 】

Distributed performance of a polymer electrolyte fuel cell (PEFC) is studied both in galvanostatic and potentiostatic mode during in-situ injection of Ca2+ in the air stream using a segmented cell. In the galvanostatic mode, segments near the inlet are affected first by the contaminant resulting in decreased current density. At the same time, despite the presence of contaminants, current density for the other segments increases in order to maintain constant total current. In the potentiostatic mode, all segments are affected by the contaminants simultaneously and the current density in all segments decreases with time. The performance of the downstream segments is lower than the upstream segments. During both tests, the contaminant is found to precipitate on both the cathode flow field and the cathode GDL surface. As the test progresses, the contaminant penetrates into the GDL and deposits, causing mass transport losses. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free