Method for metallising a porous structure made of carbon material

Patent metadata

Field	Value
Publication number	US-11427915-B2
Application number	US-201816217228-A
Country	US
Kind code	B2
Filing date	Dec 12, 2018
Priority date	Dec 19, 2017
Publication date	Aug 30, 2022
Grant date	Aug 30, 2022

Abstract

Method for metallising a porous structure made of carbon material, the method comprising the following steps: supplying a porous structure made of carbon material, immersing the porous structure in a solution comprising an ionic liquid, formed by a cation and an anion, and a metal precursor, placing the porous structure in a vacuum, immersed in the solution, in such a way as to cause the solution to penetrate into the porosity of the porous structure, adding a hydrogenated reducing agent, in such a way as to metallise the porous structure to within the porosity of the porous structure.

First claim

The invention claimed is:

1. Method for metallising a porous structure comprising carbon material, said method comprising the following steps:
a) supplying the porous structure comprising the carbon material, the porous structure having pores of 10 nm or less,
b) immersing the porous structure in a solution comprising an ionic liquid, formed by a cation and an anion, and a metal precursor,
c) placing the porous structure in a vacuum at a pressure ranging from 10 −7 bar to 10 mbar for only the duration of step c), immersed in the solution, in such a way as to cause the solution to penetrate into the porosity of the porous structure, and
d) contacting the porous structure immersed in the solution with gaseous hydrogen at a pressure ranging from 1 to 10 bars in such a way as to metallise the porous structure to within the porosity of the porous structure.

2. Method according to claim 1 , wherein the metal precursor is a copper, platinum, palladium, ruthenium, nickel, cobalt, iron, tantalum, iridium, rhodium and/or silver precursor.

3. Method according to claim 1 , wherein the metal precursor is a metal salt or an organometallic complex.

4. Method according to claim 1 , wherein the metal precursor is copper mesitylene.

5. Method according to claim 1 , wherein the placing in a vacuum of step c) is carried out for a duration ranging from 2 min to 4 h.

6. Method according to claim 1 , wherein the step d) is carried out at a temperature ranging from 0° C. to 300° C.

7. Method according to claim 1 , wherein the carbon material is chosen from carbon black, carbon nanofibres, and a mixture of carbon nanotubes and fullerenes.

8. Method according to claim 1 , wherein the carbon material comprises carbon nanotubes.

9. Method according to claim 8 , wherein the carbon material is consists of carbon nanotubes.

10. Method according to claim 8 , wherein the carbon nanotubes are at least partially open.

11. Method according to claim 8 , wherein the carbon nanotubes are in the form of a braid.

12. Method according to claim 8 , wherein the carbon nanotubes are in the form of a mat, arranged on a substrate, the carbon nanotubes being aligned parallelly or perpendicularly to the substrate.

13. Method according to claim 1 , the porous structure having pores of 5 nm or less.

14. Method according to claim 1 , the porous structure having pores of 2 nm or less.

15. Method according to claim 1 , wherein the carbon material comprises carbon nanotubes and the metal precursor is an organometallic complex.

16. Method according to claim 15 , wherein the metal precursor is copper mesitylene.

17. Method according to claim 7 , wherein the metal precursor is an organometallic complex.

18. Method according to claim 17 , wherein the organometallic complex is copper mesitylene.

19. Method according to claim 5 , wherein in step c), the porous structure is placed under vacuum for from 10 min to 30 minutes.

Assignees

• Commissariat Energie Atomique

Inventors

• Haumesser Paul-Henri
• Dijon Jean
• Ramos Raphael

Classifications

• C23C18/52

  using reducing agents for coating with metallic material not provided for in a single one of groups C23C18/32 - C23C18/50 · CPC title

• C23C18/34

  using reducing agents · CPC title

• C23C18/44

  using reducing agents · CPC title

• C23C18/1639

  Substrates other than metallic, e.g. inorganic or organic or non-conductive · CPC title

• C23C18/31

  Coating with metals · CPC title