Cathode catalyst layer, membrane electrode assembly and polymer electrolyte fuel cell and manufacturing method thereof
AssigneesToyota Jidosha Kabushiki Kaisha, E.I. duPont de Nemours and Company
InventorsNobuaki Nonoyama, Masanori Aimu, Randal Lewis Perry, Mark Gerrit Roelofs, Robert Clayton Wheland, Ralph Munson Aten
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Abstract
A cathode catalyst layer used for a polymer electrolyte fuel cell that includes an electrolyte membrane is provided. The cathode catalyst layer comprises a catalyst having weight of not greater than 0.3 mg/cm2 of a reaction surface of the cathode catalyst layer that is adjoining the electrolyte membrane; and an electrolyte resin having oxygen permeability of not less than 2.2*10−14 mol/m/s/Pa in an environment of temperature of 80 degrees Celsius and relative humidity of 50%.
Claims9
A cathode catalyst layer used for a polymer electrolyte fuel cell that includes an electrolyte membrane, comprising:
- a catalyst having weight of not greater than 0.3 mg/cm2 of a reaction surface of the cathode catalyst layer that is adjoining the electrolyte membrane;
- and
- an electrolyte resin having oxygen permeability of not less than 2.2*10-14 mol/m/s/Pa in an environment of temperature of 80 degrees Celsius and relative humidity of 50%.
A manufacturing method of a polymer electrolyte fuel cell, comprising:
- forming a cathode catalyst layer on either an electrolyte membrane or a gas diffusion layer, wherein
- the cathode catalyst layer includes:
- an electrolyte resin having oxygen permeability of not less than 2.2*10-14 mol/m/s/Pa in an environment of temperature of 80 degrees Celsius and relative humidity of 50%;
- and
- a catalyst for oxygen reduction reaction having weight of not greater than 0.3 mg/cm2 of a reaction surface of the cathode catalyst layer.
Dependencies are inferred from the claim text.