Hydrogen storage material

Patent metadata

Field	Value
Publication number	US-12378112-B2
Application number	US-202016926178-A
Country	US
Kind code	B2
Filing date	Jul 10, 2020
Priority date	Jul 10, 2019
Publication date	Aug 5, 2025
Grant date	Aug 5, 2025

Abstract

Disclosed is a method of: providing a hydrogenated sp 2 carbon allotrope, and releasing hydrogen gas from the carbon allotrope. The method may use an apparatus having: a vessel for containing the hydrogenated sp 2 carbon allotrope, a fuel cell capable of using hydrogen gas a fuel, and a tube for transporting hydrogen gas from the vessel to the fuel cell. The carbon allotrope may be made by: providing a mixture of an sp 2 carbon allotrope and liquid ammonia, adding an alkali metal to the mixture, and sonicating the mixture to form a hydrogenated form of the carbon allotrope. The hydrogenated carbon can be at least 3.5 wt % hydrogen covalently bound to the carbon.

First claim

What is claimed is:

1. A method comprising:
providing a hydrogenated sp 2 carbon allotrope comprising hydrogen covalently bound to a carbon allotrope;
wherein the hydrogenated sp 2 carbon allotrope comprises at least 5.5 wt % of the hydrogen covalently bound to the carbon allotrope; and

releasing hydrogen gas from the hydrogenated sp 2 carbon allotrope.

2. The method of claim 1 , wherein the carbon allotrope is graphene or graphite.

3. The method of claim 1 , wherein the carbon allotrope is a fullerene or carbon nanotubes.

4. The method of claim 1 , wherein the hydrogen gas is released by heating the hydrogenated sp 2 carbon allotrope.

5. The method of claim 4 , wherein the heating is performed in a reactor having an external heat source.

6. The method of claim 5 , wherein the reactor is a pressurized vessel.

7. The method of claim 4 , wherein the heating is performed by a chlorate candle.

8. The method of claim 1 , wherein the hydrogen gas is released by irradiating the hydrogenated sp 2 carbon allotrope with microwave radiation.

9. The method of claim 1 , wherein the hydrogen gas is released by treating the hydrogenated sp 2 carbon allotrope with a substance that chemically removes the hydrogen.

10. The method of claim 9 , wherein the substance is concentrated sulfuric acid or concentrated nitric acid.

11. The method of claim 1 , wherein the hydrogen gas is released at a controlled rate.

12. The method of claim 1 , wherein the releasing the hydrogen gas further comprising: directing the hydrogen gas into a fuel inlet of a fuel cell capable of using hydrogen gas as fuel.

13. The method of claim 12 , further comprising:
directing the hydrogen gas through a carbon filter before it enters the fuel cell.

14. The method of claim 1 , wherein the carbon allotrope comprises at least 7.5 wt % of the hydrogen covalently bound to the carbon allotrope.

Assignees

• Us Gov Sec Navy

Inventors

• Baldwin Jeffrey W
• Morse James R
• Zugell David A
• Matis Bernard R
• Willauer Heather D
• Gangemi Nicolas T
• Houston Brian

Classifications

• C01B32/19

  by exfoliation · CPC title

• C01P2002/89

  by mass-spectroscopy · CPC title

• C01P2002/88

  by thermal analysis data, e.g. TGA, DTA, DSC · CPC title

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• B01J3/04

  Pressure vessels, e.g. autoclaves · CPC title