Cellular graphene films
AssigneeThe Regents of the University of California
InventorsRichard Barry Kaner, Yuanlong Shao
Life of this patent
Estimating the term…
Abstract
The present disclosure provides supercapacitors that may avoid the shortcomings of current energy storage technology. Provided herein are electrochemical systems, comprising three dimensional porous reduced graphene oxide film electrodes. Prototype supercapacitors disclosed herein may exhibit improved performance compared to commercial supercapacitors. Additionally, the present disclosure provides a simple, yet versatile technique for the fabrication of supercapacitors through the direct preparation of three dimensional porous reduced graphene oxide films by filtration and freeze casting.
Claims20
A method of fabricating a graphene oxide film, comprising:
- (a) suspending a graphene oxide in a first solvent to form a graphene oxide suspension;
- (b) dispersing the graphene oxide suspension in a second solvent to form a graphene oxide dispersion;
- (c) reducing the graphene oxide dispersion;
- (d) filtering the graphene oxide dispersion through a membrane to form a graphene oxide film on the membrane;
- and
- (e) freeze-casting the graphene oxide film on the membrane, wherein the graphene oxide film has a tensile strength of about 9 MPa to about 36 MPa.
Dependencies are inferred from the claim text.