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US 8,574,789 B2Granted
Dendritic metal nanostructures for fuel cells and other applications
AssigneesToyota Motor Engineering & Manufacturing North America, Inc., Sandia Corporation
InventorsJohn A. Shelnutt, Wen Li, Yujiang Song, Michael A. Hickner
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Abstract
Embodiment of the present invention relate to dendrimers useful for application as catalysts, in particular as improved electrocatalysts for polymer electrolyte membrane fuel cells (PEM-FCs). Methods of preparing such catalysts are described. Examples include dendritic nanostructured metal catalysts, such as platinum and platinum-alloy catalysts.
Claims26
A membrane-electrode assembly (MEA) comprising:
- a first electrode;
- a second electrode;
- an ion-conducting membrane located between the first electrode and the second electrode,
- the first electrode including dendritic nanostructures which act as an electrocatalyst during operation of the membrane-electrode assembly,
- the dendritic structures being dendritic nanosheets, the dendritic nanosheets being generally disk-shaped.
2 more elements
A fuel cell, comprising:
- a first electrode;
- a second electrode;
- and
- an electrolyte located between the first electrode and the second electrode,
- the first electrode including an electron-conducting material and a catalyst,
- the catalyst including dendritic structures, the dendritic structures being metal dendrimers including platinum, the dendritic structures having branched arms,
- the dendritic structures being dendritic nanosheets, the dendritic nanosheets being generally disk-shaped nanosheets.
4 more elements
Dependencies are inferred from the claim text.