Cathode for a battery

Patent metadata

Field	Value
Publication number	US-9337472-B2
Application number	US-201514754927-A
Country	US
Kind code	B2
Filing date	Jun 30, 2015
Priority date	Sep 13, 2011
Publication date	May 10, 2016
Grant date	May 10, 2016

Abstract

An electrode for an electrochemical cell including an active electrode material and an intrinsically conductive coating wherein the coating is applied to the active electrode material by heating the mixture for a time and at a temperature that limits degradation of the cathode active material.

First claim

The invention claimed is:

1. A method of making an electrode for an electrochemical cell, comprising:
combining a coating composition and an active electrode material to form a mixture, wherein the coating composition comprises a coating precursor in which at least 35% of carbon atoms in the coating precursor are sp or sp 2 hybridized;
heating the mixture for a time and at a temperature that limits degradation of the active electrode material;
mixing the coated active electrode material with a binder material and a conductive additive to form an electrode-forming mixture; and
heating the electrode-forming mixture to form the electrode.

2. The method of claim 1 wherein the active electrode material comprises an oxide compound, fluoride compound, a phosphate compound, or a silicate compound.

3. The method of claim 1 wherein the mixture is heated for a time that limits degradation of the active electrode material.

4. The method of claim 1 wherein the first heating step forms a covalently attached coating on the active electrode material.

5. The method of claim 1 wherein at least 90% of carbon atoms in the coating precursor are sp or sp 2 hybridized.

6. The method of claim 1 wherein 100% of carbon atoms in the coating precursor are sp or sp 2 hybridized.

7. The method of claim 1 wherein the coating precursor comprises a core in which 90% of carbon atoms in the core are sp or sp 2 hybridized.

8. The method of claim 1 wherein the coating precursor comprises a core in which 100% of carbon atoms in the core are sp or sp 2 hybridized.

9. The method of claim 3 wherein the mixture is heated for a time in a range of from about 0.5 hours to about 6 hours.

10. The method of claim 1 wherein the coating precursor comprises naphthalene.

11. The method of claim 1 wherein the coating precursor comprises pentacene.

12. The method of claim 1 wherein the coating precursor comprises anthracene.

13. The method of claim 2 wherein the active electrode material comprises an oxide compound and the oxide compound comprises a metal oxide compound.

14. The method of claim 13 wherein the oxide compound comprises a lithium-manganese-nickel-oxygen compound.

15. The method of claim 13 wherein the oxide compound comprises a lithium-manganese-oxygen compound.

16. The method of claim 13 wherein the oxide compound comprises a lithium-rich layered oxide compound.

17. The method of claim 2 wherein the active electrode material comprises a fluoride compound and the fluoride compound comprises a metal fluoride compound.

18. The method of claim 2 wherein the active electrode material comprises a phosphate compound and the phosphate compound comprises a metal phosphate compound.

19. The method of claim 18 wherein the phosphate compound comprises a lithium-iron-phosphate compound.

20. The method of claim 2 wherein the active electrode material comprises a silicate compound and the silicate compound comprises a metal silicate compound.

Assignees

• Wildcat discovery technologies inc
• Wildcat discovery technologies inc

Inventors

• Caldwell Marissa
• Kaye Steven
• O'Neill Cory
• Tong Wei
• Keogh David

Classifications

• H01M4/583

  Carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• H01M4/382

  Lithium (H01M4/405 takes precedence) · CPC title

• H01M4/0402

  Methods of deposition of the material · CPC title

• H01M4/08

  Processes of manufacture · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title