Hydrogen storage complex for low-purity hydrogen storage and method for producing the same

Abstract

This invention relates to a hydrogen storage complex and a method for producing the same. More specifically, the hydrogen storage complex of the present invention is a complex in which hydrogen storage particles are surrounded by a hydrogen permeable and antioxidant membrane that selectively separates only hydrogen molecules, and the conventional hydrogen purification process and storage process are integrated. The hydrogen storage complex can prevent oxidation and performance degradation of the hydrogen storage particles by oxidizing species gases, and even in a low-purity hydrogen environment, the oxidation of the hydrogen storage particles is delayed, enabling the continuous storage of hydrogen.

Claims

1. Hydrogen storage particles are single-molecule particles or aggregated particles of single-molecule particles made of metal hydrides, A hydrogen storage complex comprising a hydrogen permeable and antioxidant film formed on part or all of the surface of the hydrogen storage particles, which selectively enables hydrogen permeation and prevents oxidation of the hydrogen storage particles.

2. The hydrogen storage complex according to claim 1, wherein the hydrogen permeable and antioxidant film is selected from one or more metal compounds selected from the group consisting of graphene oxide (GO), reduced graphene oxide (rGO), or a mixture thereof, graphene derivatives, graphitic carbon nitride, metal oxides, metal nitrides, and pure metals.

3. The hydrogen storage complex according to claim 1, wherein the hydrogen permeable and antioxidant membrane is contained in the hydrogen storage complex in an amount of 2 to 50 wt%.

4. The hydrogen storage complex according to claim 1, wherein the metal hydride is one or more metal compounds selected from the group consisting of alkali metals, alkaline earth metals, and transition metals.

5. The hydrogen storage composite according to claim 1, wherein the hydrogen storage particles have an average diameter of 2 nm to 50 μm.

6. The hydrogen storage complex according to claim 1, wherein the volume preservation rate is 23% or more when hydrogen is absorbed in a low-purity hydrogen environment.

7. The hydrogen storage complex according to claim 6, wherein the low-purity hydrogen environment is a mixed gas in which the hydrogen composition is 90% or more.

8. A hydrogen storage complex composition comprising the hydrogen storage complex described in any one of claims 1 to 7.

9. A hydrogen storage method characterized by storing hydrogen in a hydrogen storage complex according to any one of claims 1 to 7.

10. A step of producing hydrogen storage particles from a metal hydride precursor solution containing a precursor material for hydrogen storage particles, A method for producing a hydrogen storage complex, comprising the steps of: mixing the hydrogen storage particles with a hydrogen permeable and antioxidant film solution to form a hydrogen permeable and antioxidant film on part or all of the surface of the hydrogen storage particles.

11. The method for producing a hydrogen storage complex according to claim 10, wherein the metal hydride precursor solution contains a metal hydride or organometallic compound, which comprises one or more metal compounds selected from the group consisting of alkali metals, alkaline earth metals, and transition metals, dissolved in a solvent.

12. The method for producing a hydrogen storage complex according to claim 10, wherein the hydrogen permeable and antioxidant membrane solution is a mixture in a solvent of one or more mixtures selected from the group consisting of graphene oxide (GO), reduced graphene oxide (rGO), a graphene derivative containing any one or a mixture thereof, graphitic carbon nitride, and a metal precursor.

13. The method for producing a hydrogen storage complex according to claim 10, further comprising the step of stirring the metal hydride precursor solution and the hydrogen permeation and antioxidant membrane solution, and then adding a reducing agent to co-reduce the mixture.

14. A step of producing hydrogen storage particles in the form of a powdered alloy, A method for producing a hydrogen storage composite, comprising the steps of heating the hydrogen storage particles in an oxygen or nitrogen atmosphere to form a hydrogen permeable and antioxidant film on part or all of the surface of the hydrogen storage particles.

15. The alloy form is AB 5 , AB 2 , AB, A 2 A method for producing a hydrogen storage composite according to claim 14, wherein the alloy has a B,A structure, A is selected from magnesium (Mg), calcium (Ca), titanium (Ti), and zirconium (Zr) that can form hydrides, and metal B is a transition metal.

16. The method for producing the hydrogen storage complex according to claim 14, wherein a hydrogen permeation and oxidation prevention film is formed on the hydrogen storage particles with a metal oxide or metal nitride.

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