Title
Effects Of Silicotungstic Acid Addition To The Electrodes Of Polymer Electrolyte Membrane Fuel Cells
Abstract
Operation of polymer electrolyte membrane fuel cells at elevated temperatures and low relative humidity is limited by the electrolyte's dependence on water. The addition of a heteropolyacid, specifically silicotungstic acid (STA), is shown to increase the activity of platinum for the oxygen reduction reaction by nearly 73% at 118°C/40% relative humidity. However, STA-containing electrodes have a significantly higher diffusion resistance, countering any activity improvement at higher currents. By reducing the electrode ionomer weight fraction, the diffusion resistance decreases. Also, membrane durability is improved significantly by including STA at the cathode. © 2009 The Electrochemical Society.
Publication Date
10-13-2009
Publication Title
Journal of the Electrochemical Society
Volume
156
Issue
11
Document Type
Article
DOI Link
https://doi.org/10.1149/1.3216001
Copyright Status
Unknown
Socpus ID
70349748620 (Scopus)
Source API URL
https://api.elsevier.com/content/abstract/scopus_id/70349748620
STARS Citation
Brooker, R. Paul; Baker, Phillip; Kunz, H. Russell; Bonville, Leonard J.; and Parnas, Richard, "Effects Of Silicotungstic Acid Addition To The Electrodes Of Polymer Electrolyte Membrane Fuel Cells" (2009). Scopus Export 2000s. 12778.
https://stars.library.ucf.edu/scopus2000/12778