Overcoming those barriers and ultimately meeting the challenging automotive PEFC performance targets requires comprehensive research and development effort on new PGM-free cathodes. In this work, we use a newly developed approach to synthesize PGM-free catalysts for Fe-doped metal-organic framework (MOF) precursors that yield atomically-dispersed FeN4-type active sites. These catalysts exhibit high activity and improved stability at typical fuel cell operating voltages. This presentation will focus on the development of membrane electrode assemblies with cathodes prepared from this catalyst. Specific areas that will be covered are water management in thick PGM-free cathodes, ionomer integration, and cathode fabrication. The implementation of these new materials and electrode designs is supported by a suite of advanced experimental and simulation tools that identify performance and durability bottlenecks, devise solutions, and establish rational material design and future synthesis targets.
This material is based upon work supported by the U.S. Department of Energy’s Office of Energy Efficiency and Renewable Energy (EERE) under the Fuel Cell Technologies Office (FCTO) under Award Number DE-EE0008076. The authors gratefully acknowledge research support from the Electrocatalysis Consortium (ElectroCat), established as part of the Energy Materials Network under the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy, Fuel Cell Technologies Office, under Contract Number DE-EE0008076.