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US 12,614,736 B2Granted
Fuel cell graphene-based material for capturing catalyst particles
AssigneeRobert Bosch GmbH
InventorsJonathan Mailoa, Georgy Samsonidze, Soo Kim, Mordechai Kornbluth, Ulrich Berner
Life of this patent
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Abstract
A fuel cell catalyst layer includes a catalyst support, a catalyst material, and a graphene-based material. The catalyst material includes catalyst particles in an atomic form at a beginning of operation or life of the fuel cell catalyst layer. The graphene-based material includes defects capturing dissolved particles ionized from the atomic form after the beginning of operation or life of the fuel cell catalyst layer.
Claims20
A fuel cell catalyst layer comprising:
- a catalyst support;
- a catalyst material including catalyst particles in an atomic form at a beginning of operation or life of the fuel cell catalyst layer;
- and
- a graphene-based material including defects capturing dissolved catalyst particles ionized from the atomic form after the beginning of operation or life of the fuel cell catalyst layer.
1 more element
A fuel cell comprising:
- a polymer electrolyte membrane (PEM);
- first and second catalyst layers situating the PEM therebetween, the first catalyst layer including a first catalyst support, a first catalyst material including first catalyst particles in an atomic form at a beginning of operation or life of the fuel cell, and a first graphene-based material including first defects capturing first dissolved catalyst particles ionized from the atomic form after the beginning of operation or life of the fuel cell, the second catalyst layer including a second catalyst support, a second catalyst material including second catalyst particles in the atomic form at the beginning of operation or life of the fuel cell, and second graphene-based material including second defects capturing second dissolved catalyst particles ionized from the atomic form after the beginning of operation or life of the fuel cell, thereby reducing loss of active catalyst particles.
A method of operating a fuel cell, the method comprising:
- beginning operation of the fuel cell at a beginning of operation or life, the fuel cell including a polymer electrolyte membrane (PEM) and first and second catalyst layers situating the PEM therebetween, the first catalyst layer including a first catalyst support, a first catalyst material including first catalyst particles in an atomic form at the beginning of operation or life of the fuel cell, and a first graphene-based material including first defects, the second catalyst layer including a second catalyst support, a second catalyst material including second catalyst particles in the atomic form at the beginning of operation or life of the fuel cell, and second graphene-based material including second defects;
- capturing, within the first defects, first dissolved catalyst particles ionized from the atomic form after the beginning of operation or life and during operation of the fuel cell to form first captured catalyst particles;
- and
- capturing, within the second defects, second dissolved catalyst particles ionized from the atomic form after beginning of operation or life and during operation of the fuel cell to form second captured catalyst particles.
1 more element
Dependencies are inferred from the claim text.