The biggest issue that must be addressed in promoting widespread use of fuel cell vehicles (FCVs) is to reduce the cost of the fuel cell system. Especially, it is of vital importance to reduce platinum (Pt) loading of catalyst layers (CLs) in the membrane electrode assembly (MEA) of a proton exchange membrane fuel cell (PEMFC). In order to lower the Pt loading of the MEA, mass transport of reactants related to the performance in high current density should be enhanced significantly as well as kinetics of the catalyst, which can result in the better Pt utilization and effectiveness. In this study, the authors summarized their analytical approach and methods for reduction of Pt loading in CLs. Microstructure, mass transport properties of the reactants, and their relation in CLs were elucidated by applying experimental analyses and computational methods. A simple CL model for I-V performance prediction was then established, where experimentally elucidated parameters of the microstructure and the properties in CLs were taken into account. Finally, the authors revealed the impact of lowering the Pt loading on the transport properties, polarization, and the I-V performance.
Analysis of proton exchange membrane fuel cell catalyst layers for reduction of platinum loading at Nissan
Untersuchung der katalytischen Schichten für Protonenaustauschmembranbrennstoffzellen zwecks Verringerung des Platingehalts bei Nissan
Electrochemistry from Biology to Physics, Annual Meeting of the International Society of Electrochemistry, 61 ; 10832-10841
Electrochimica Acta ; 56 , 28
2011
10 Seiten, 21 Bilder, 2 Tabellen, 29 Quellen
Aufsatz (Konferenz)
Englisch
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