Graphene oxide and carbon nanotube ink and methods for producing the same

Patent metadata

Field	Value
Publication number	US-2016293347-A1
Application number	US-201315034377-A
Country	US
Kind code	A1
Filing date	Nov 5, 2013
Priority date	Nov 5, 2013
Publication date	Oct 6, 2016
Grant date	—

Abstract

An energy device including a paper based substrate having a top surface and a bottom surface, and a graphene oxide and carbon nanotube composite deposited onto at least the top surface. The energy device can be used as an electrode in, for example, a supercapacitor.

First claim

The claimed invention is:

1 . An energy device, comprising
a paper based substrate having a top surface and a bottom surface; and a graphene oxide and carbon nanotube composite deposited onto at least the top surface.

2 . The energy device of claim 1 , wherein the graphene oxide and carbon nanotube composite is substantially free from a surfactant.

3 . The energy device of claim 1 , wherein the graphene oxide and carbon nanotube composite comprises about 15 weight percent to about 85 weight percent of graphene oxide.

4 . The energy device of claim 1 , wherein the graphene oxide and carbon nanotube composite comprises about 15 weight percent to about 85 weight percent of carbon nanotubes.

5 . The energy device of claim 1 , wherein the carbon nanotubes are single-wall carbon nanotubes.

6 . The energy device of claim 1 , wherein the energy device does not include a binder.

7 . The energy device of claim 1 , wherein the graphene oxide is a single layer graphene oxide flake.

8 . The energy device of claim 7 , wherein the single layer graphene oxide flake has a thickness within a range of about 0.35 nanometers to about 50 nanometers.

9 . The energy device of claim 7 , wherein the single layer graphene oxide flake has a length within a range of about 200 nanometers to about 500 nanometers.

10 . A supercapacitor, comprising:
a first electrode including:
a first paper based substrate having a top surface and a bottom surface, and
a first graphene oxide and carbon nanotube composite deposited onto at least the top surface;
a second electrode, including:
a second paper based substrate having a top surface and a bottom surface, and
a second graphene oxide and carbon nanotube composite deposited onto at least the top surface;
an electrolyte; and a separator positioned between the first electrode and the second electrode.

11 . The supercapacitor of claim 10 , wherein the first graphene oxide and carbon nanotube composite and the second graphene oxide and carbon nanotube composite comprise about 15 weight percent to about 85 weight percent of graphene oxide.

12 . The supercapacitor of claim 10 , wherein the graphene oxide and carbon nanotube composite and the second graphene oxide and carbon nanotube composite comprise about 15 weight percent to about 85 weight percent of carbon nanotubes.

13 . The supercapacitor of claim 12 , wherein the carbon nanotubes are single-wall carbon nanotubes.

14 . The supercapacitor of claim 10 , wherein the first graphene oxide and carbon nanotube composite and the second graphene oxide and carbon nanotube composite comprise a plurality of graphene oxide flakes, the graphene oxide flake having a thickness within a range of about 0.35 nanometers to about 50 nanometers and a length within a range of about 200 nanometers to about 500 nanometers.

15 . A method, comprising:
obtaining or providing a graphene oxide and carbon nanotube dispersion, the graphene oxide and carbon nanotube dispersion substantially free from a surfactant; and depositing the graphene oxide and carbon nanotube dispersion onto a surface of a paper based substrate.

16 . The method of claim 15 , wherein the graphene oxide and carbon nanotube dispersion comprises carbon nanotubes within a range of about 0.5 milligrams per milliliter to about 12 milligrams per milliliter.

17 . The method of claim 15 , comprising treating the coated porous metal substrate with ultraviolet-generated ozone for a time period.

18 . The method of claim 15 , comprising drying the graphene oxide and carbon nanotube dispersion deposited onto the surface of the paper based substrate.

19 . The method of claim 15 , wherein the pH of the graphene oxide and carbon nanotube dispersion is within a range of about 6 to about 12.

20 . The method of claim 15 , wherein the carbon nanotubes are single-wall carbon nanotubes.

Assignees

• Theregents Of The Univ Of California
• Univ California

Inventors

• Guo Shirui
• Wang Wei
• Ozkan Cengzi S
• Ozkan Mihrimah

Classifications

• H01G11/52

  Separators · CPC title

• H01G11/36 Primary

  Nanostructures, e.g. nanofibres, nanotubes or fullerenes · CPC title

• H01G11/24 Primary

  characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor · CPC title

• C09D11/52

  Electrically conductive inks · CPC title

• H01G11/28

  arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives · CPC title