Crosslinked Graphene and Graphite Oxide

• US 20110189452A1
• Filed: 07/31/2010
• Published: 08/04/2011
• Est. Priority Date: 07/31/2009
• Status: Abandoned Application

• Current Assignee: Vorbeck Materials
• Original Assignee: Vorbeck Materials
• Inventors: Varma, Vipin, Scheffer, Dan, Lettow, John, Redmond, Kate
• Application Number:
  US12/848,148
• Publication Number:
  US 20110189452A1
• Time in Patent Office: Days
• US Class Current: 428/220
• CPC Class Codes: B05D 3/10 by other chemical means
• CPC Class Codes: B32B 9/00 Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
• CPC Class Codes: B82Y 30/00 Nanotechnology for materials or surface science, e.g. nanocomposites
• CPC Class Codes: B82Y 40/00 Manufacture or treatment of nanostructures
• CPC Class Codes: C01B 2204/04 Specific amount of layers or specific thickness
• CPC Class Codes: C01B 32/00 Carbon; Compounds thereof C01B21/00, C01B23/00 take precedence; percarbonates C01B15/10; carbon black C09C1/48
• CPC Class Codes: C01B 32/05 Preparation or purification of carbon not covered by groups C01B32/15, C01B32/20, C01B32/25, C01B32/30
• CPC Class Codes: C01B 32/192 starting from graphitic oxides
• CPC Class Codes: C01B 32/225 Expansion; Exfoliation
• CPC Class Codes: C01B 32/23 Oxidation
• CPC Class Codes: C01P 2006/40 Electric properties
• CPC Class Codes: C08K 3/042 Graphene or derivatives, e.g. graphene oxides
• CPC Class Codes: H01B 1/04 mainly consisting of carbon-silicon compounds, carbon or silicon
• CPC Class Codes: H01B 1/24 the conductive material comprising carbon-silicon compounds, carbon or silicon

Abstract

Compositions comprising crosslinked graphene sheets and/or graphite oxide and having essentially no polymer binder and methods of making crosslinked graphene sheets and/or graphite oxide. The compositions can be made by crosslinking coatings comprising graphene sheets and/or graphite oxide.

Claims

1. A composition, comprising crosslinked graphene sheets and/or graphite oxide.

2. The composition of claim 1, comprising graphene sheets.

3. The composition of claim 1, wherein the composition of claim 1, wherein the graphene sheets have a surface area of at least about 300 m²/g.

4. The composition of claim 1, wherein the graphene sheets have a surface area of at least about 400 m²/g.

5. The composition of claim 1, wherein the graphene sheets have a surface area of at least about 500 m²/g.

6. The composition of claim 1, wherein the graphene sheets have a carbon to oxygen molar ratio of at least about 25:

1.

7. The composition of claim 1, wherein the graphene sheets have a carbon to oxygen molar ratio of at least about 75:

1.

8. The composition of claim 1 having an electrical conductivity of at least about 10 S/cm.

9. The composition of claim 1 having an electrical conductivity of at least about 10² S/cm.

10. The composition of claim 1 in the form of a film.

11. A method of making a composition, comprising crosslinking graphene sheets and/or graphite oxide.

12. The method of claim 11, wherein the crosslinked graphene sheets and/or graphite oxide are reduced.

13. The method of claim 11, wherein a coating comprising graphene sheets and/or graphite oxide is applied to a substrate and the graphene sheets and/or graphite oxide are crosslinked.

14. The method of claim 11, wherein graphene sheets and/or graphite oxide are combined with at least one crosslinking agent and crosslinked.

15. The method of claim 11, wherein the cross-linking agent is a radical initiator.

16. The method of claim 11, wherein the cross-linking agent is a peroxide.

17. The method of claim 11, wherein the cross-linking agent is dicumyl peroxide and/or dibenzoyl peroxide.

18. The method of claim 11, wherein the graphene sheets and/or graphite oxide are combined with at least one crosslinking agent and crosslinked to form a film.

19. The method of claim 11, wherein the graphene sheets and/or graphite oxide have a surface area of at least about 300 m²/g.

20. The method of claim 11, wherein the graphene sheets and/or graphite oxide have a carbon to oxygen molar ratio of at least about 10:

1.