Anticorrosive and conductive material

Patent metadata

Field	Value
Publication number	US-11444292-B2
Application number	US-201816233575-A
Country	US
Kind code	B2
Filing date	Dec 27, 2018
Priority date	Dec 27, 2018
Publication date	Sep 13, 2022
Grant date	Sep 13, 2022

Abstract

An anticorrosive and conductive substrate includes a bulk portion and a surface portion including a magnesium titanium material having a formula (I) TixMg1-xOy (I), where x is a number from 0 to ≤1 and y is a number from 1 to ≤2, and wherein at least about 50% of the magnesium titanium material has a cubic crystal structure, and wherein the magnesium titanium material is configured to impart anticorrosive and conductive properties to the substrate.

First claim

What is claimed is:

1. An anticorrosive and conductive substrate comprising:
a bulk portion; and
a surface portion including a magnesium titanium oxide material including both an electrically conductive TiO phase and an electrically insulating MgO phase, and including less than about 15 atomic % Ti,
wherein at least about 50% of the magnesium titanium oxide material includes both MgO and TiO having cubic crystal structures, and wherein the magnesium titanium material is configured to impart anticorrosive and conductive properties to the substrate.

2. The substrate of claim 1 , wherein the magnesium titanium oxide material includes between about 3 and 10 atomic % Ti.

3. The substrate of claim 1 , wherein the magnesium titanium oxide material further includes MgO and TiO nanodomains.

4. The substrate of claim 3 , wherein the TiO nanodomains are electrically conductive.

5. The substrate of claim 1 , wherein electrical conductivity of the material is greater than about 100 S cm −1.

6. The substrate of claim 1 , wherein an interfacial contact resistance between the substrate and the material is less than about 0.001 to 0.2 Ohm cm 2 .

7. The substrate of claim 1 , wherein the bulk portion is steel.

8. The substrate of claim 1 , wherein the bulk portion is glass and the material is configured to form a transparent film on the surface portion.

9. The substrate of claim 1 , wherein both MgO and TiO have matching cubic crystal structures.

10. The substrate of claim 1 , wherein the material further includes a solid solution of TiO distributed within the cubic crystal structure of MgO.

11. The substrate of claim 10 , wherein the distribution is uniform.

12. An anticorrosive and conductive substrate comprising:
a bulk portion; and
a surface portion including a magnesium titanium oxide material having both an electrically insulating, chemically inert MgO phase and an electrically conductive TiO phase, and including more than about 10 atomic % Ti such that the material includes:
MgO cubic crystal structures and TiO cubic crystal structures, and
MgO electrically insulating nanodomains and TiO electrically conductive nanodomains,
the material being configured to impart anticorrosive and conductive properties to the substrate.

13. The substrate of claim 12 , wherein the material further includes at least one electrically conductive ordered Mg-Ti-O compound.

14. The substrate of claim 13 , where the at least one electrically conductive ordered Mg-Ti-O compound includes Mg 2 Ti 7 O 15 .

15. The substrate of claim 12 , wherein both MgO and TiO have matching cubic crystal structures.

16. The substrate of claim 12 , wherein the material further includes a solid solution of TiO distributed within the cubic crystal structure of MgO.

Assignees

• Bosch Gmbh Robert

Inventors

• Kornbluth Mordechai
• Kim Soo
• Mailoa Jonathan
• Cheng Lei
• Samsonidze Georgy
• Kozinsky Boris
• Craig Nathan
• Kuppan Saravanan
• Hellstrom Sondra
• Christensen Jake

Classifications

• Y02E60/50

  Fuel cells · CPC title

• C25D7/0614

  Strips or foils · CPC title

• H01M8/0228 Primary

  in the form of layered or coated products · CPC title

• C25D9/04

  with inorganic materials · CPC title

• H01M2008/1095

  Fuel cells with polymeric electrolytes · CPC title