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US 9,431,662 B2Granted
Fuel cell electrodes using high density support material
AssigneeNissan North America, Inc.
InventorTaehee Han
Life of this patent
Estimating the term…
Abstract
Methods of preparing fuel cells and fuel cell electrodes having catalyst with high density catalyst support are provided. One method of fabricating a fuel cell electrode comprises adjusting the gravimetric ratio of ionomer to catalyst support based on the density of the support material to optimize ionomer performance.
Claims18
A method of fabricating a fuel cell electrode comprising:
- setting a target volumetric ratio of an ionomer to a high density catalyst support by:
- selecting a desired gravimetric ratio of the ionomer to a reference catalyst support and calculating a corresponding volumetric ratio of the ionomer to the reference catalyst support;
- and
- setting the target volumetric ratio to the corresponding volumetric ratio;
- determining a relationship between a gravimetric ratio and a volumetric ratio for the high density catalyst support;
- from the target volumetric ratio and the relationship, calculating a target gravimetric ratio of the ionomer to the high density support;
- preparing the catalyst ink from a mass of the ionomer and a mass of the high density support based on the target gravimetric ratio of the ionomer to the high density support;
- and
- coating the catalyst ink onto a membrane to form a catalyst layer on the membrane.
6 more elements
A method of manufacturing a fuel cell comprising:
- preparing a catalyst ink comprising:
- setting a target volumetric ratio of an ionomer to a high density catalyst support by:
- selecting a desired gravimetric ratio of the ionomer to a reference catalyst support and calculating a corresponding volumetric ratio of the ionomer to the reference catalyst support;
- and
- setting the target volumetric ratio to the corresponding volumetric ratio;
- determining a relationship between a gravimetric ratio and a volumetric ratio for the high density catalyst support;
- and
- from the target volumetric ratio and the relationship, calculating a target gravimetric ratio of the ionomer to the high density support;
- preparing the catalyst ink comprising active catalyst particles, the high density support and the ionomer according to the target gravimetric ratio of the ionomer to the high density support;
- and
- coating the catalyst ink onto a membrane.
8 more elements
Dependencies are inferred from the claim text.