Porous electrode optimization in anion-exchange membrane fuel cells
2015 (English)In: Proceedings of the 6th European Fuel Cell - Piero Lunghi Conference, EFC 2015, ENEA , 2015, 221-222 p.Conference paper (Refereed)
The performance of anion-exchange membrane fuel cells is highly dependent on electrode preparation. This study has investigated the influence of water content and catalyst to ionomer ratio in the electrode ink on in-situ fuel cell performance and the electrode microstructure using SEM. It has shown that changing the solvent composition affects the electrode properties. Higher water content in ink results in a lower power density. An increase in water content from 40 to 70 vol% shows a 500 mA/cm2 drop in current density. SEM analysis of newly prepared electrodes revealed an observable difference in the microstructure. This indicates that for high water volume the ionomer distribution in the electrode is very uneven. The results also indicate that lower ionomer content in the bulk of the structure lowers the cell performance, which may be explained by limited hydroxide transportation.
Place, publisher, year, edition, pages
ENEA , 2015. 221-222 p.
Anion exchange membranes (AEM), Electrode composition, Electrode ink, Polymer electrolyte fuel cells (PEFC), Alkaline fuel cells, Electrodes, Electrolytes, Fuel cells, Gas fuel purification, Ion exchange membranes, Ionomers, Ions, Microstructure, Polyelectrolytes, Anion-exchange membrane fuel cells, Electrode microstructures, Electrode preparation, Fuel cell performance, Increase in water content, Polymer electrolyte fuel cells, Proton exchange membrane fuel cells (PEMFC)
IdentifiersURN: urn:nbn:se:kth:diva-202903ScopusID: 2-s2.0-84994589068ISBN: 9788882863241 OAI: oai:DiVA.org:kth-202903DiVA: diva2:1079156
6th European Fuel Cell Technology and Applications Conference - Piero Lunghi Conference, EFC 2015, 16 December 2015 through 18 December 2015
QC 201703072017-03-072017-03-072017-03-07Bibliographically approved