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US 10,240,052 B2Granted
Supercapacitor electrodes including graphenic carbon particles
AssigneePPG Industries Ohio, Inc.
InventorsDavid B. Asay, Noel R. Vanier, Anand K. Atmuri, Stuart D. Hellring, Cheng-Hung Hung, Charles F. Kahle, John W. Burgman, Ran Yi
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Abstract
Supercapacitor electrodes comprising active charge supporting particles, graphenic carbon particles, and a binder are disclosed. The active charge supporting particles may comprise activated carbon. The graphenic carbon particles may be thermally produced. The electrodes may further comprise electrically conductive carbon.
Claims15
A supercapacitor electrode comprising:
- a conductive foil substrate layer;
- and
- electrode coating layers on opposite sides of the conductive foil substrate layer, wherein each electrode coating layer comprises:
- from 50 to 95 weight percent active carbon particles;
- from 1 to 10 weight percent thermally produced graphenic carbon particles comprising one or more layers of one-atom-thick planar sheets of sp2-bonded carbon atoms densely packed in a honeycomb crystal lattice having an aspect ratio of greater than 3:1 and a B.E.T. specific surface area of at least 70 square meters per gram;
- and
- from 1 to 15 weight percent binder.
4 more elements
An electrode coating comprising:
- from 50 to 95 weight percent active carbon particles;
- from 1 to 10 weight percent thermally produced graphenic carbon particles comprising one or more layers of one-atom-thick planar sheets of sp2-bonded carbon atoms densely packed in a honeycomb crystal lattice having an aspect ratio of greater than 3:1 and a B.E.T. specific surface area of at least 70 square meters per gram;
- and
- from 1 to 15 weight percent binder.
1 more element
Dependencies are inferred from the claim text.