Fuel cell performance using a phosphonated polysulphone ionomer (PSUgPVPA) in the PEM cathode electrode
2013 (English)In: Fuel Cell Membranes, Electrode Binders, And Mea Performance, Electrochemical Society, 2013, no 23, 33-45 p.Conference paper (Refereed)
Inexpensive and environmentally friendly electrolyte polymers that can be operated at higher temperatures and drier conditions are highly interesting for PEM fuel cells for automotive, portable power and stationary electricity generation applications. In this study an ionomer based on polysulfone grafted with poly(vinylphosphonic acid) (PSUgPVPA) in the cathode Pt/C catalyst layer (CL) was electrochemically characterized and compared to Nafion (R). The performance at different levels of humidity at 80 degrees C was evaluated by polarization and cyclic voltammetry. The results show that the performance of the PSUgPVPA-based cathode CL is comparable to that of Nafion (R) at 100% relative humidity (RH) but with some instabilities. However, at drier conditions significant losses of performance for the PSUgPVPA-based cathode was observed, concomitant to a reduced electrochemical surface area. The lower performance at low humidity is concluded to be due to a combination of lower proton conductivity and wettability or interference with oxygen reduction reaction at lower RH.
Place, publisher, year, edition, pages
Electrochemical Society, 2013. no 23, 33-45 p.
, ECS Transactions, ISSN 1938-5862 ; 45
Proton-Exchange Membranes, Gas-Diffusion Electrodes, Mass-Transport Limitations, Pefc Cathode, Poly(Vinylphosphonic Acid), Intermediate Temperature, Transient Techniques, Protogenic Group, Catalyst Layers, Side-Chains
Other Chemical Engineering
IdentifiersURN: urn:nbn:se:kth:diva-133501DOI: 10.1149/04523.0033ecstISI: 000325202900004ScopusID: 2-s2.0-84885807043ISBN: 978-1-60768-394-0OAI: oai:DiVA.org:kth-133501DiVA: diva2:662111
Symposium on Fuel Cell Membranes, Electrode Binders, and MEA Performance - 221st ECS Meeting; Seattle, WA; United States; 6 May 2012 through 10 May 2012
QC 201311062013-11-062013-11-062016-04-18Bibliographically approved