Additives to mitigate catalyst layer degradation in fuel cells
AssigneesFord Motor Company, Daimler AG
InventorsJing Li, Keping Wang, Yunsong Yang, Scott McDermid, Sumit Kundu
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Abstract
Ligand additives having two or more coordination sites in close proximity can be used in the polymer electrolyte of membrane electrode assemblies in solid polymer electrolyte fuel cells in order to reduce the dissolution of catalyst, particularly from the cathode, and hence reduce fuel cell degradation over time.
Claims14
A proton conducting composite polymer electrolyte for a membrane electrode assembly in a solid polymer electrolyte fuel cell comprising a proton conducting ionomer and an amount of a ligand additive wherein the ligand comprises a molecule or polymer thereof wherein the chemical structure of the molecule is selected from the group consisting of:
- wherein R and R′ are selected from the group consisting of H, OH, NH2, CH3(CH2)n, and an aromatic group, and wherein n is an integer from 0 to 10.
Dependencies are inferred from the claim text.