Method of making high capacity electrode material

Patent metadata

Field	Value
Publication number	US-11094923-B2
Application number	US-201916460608-A
Country	US
Kind code	B2
Filing date	Jul 2, 2019
Priority date	Jul 2, 2019
Publication date	Aug 17, 2021
Grant date	Aug 17, 2021

Abstract

A method of manufacturing lithium-metal nitride including suspending a lithium-metal-oxide-powder (LMOP) within a gaseous mixture, incrementally heating the suspended LMOP to a holding temperature of between 400 and 800 degrees Celsius such that the LMOP reaches the holding temperature, and maintaining the LMOP at the holding temperature for a time period in order for the gaseous mixture and the LMOP to react to form a lithium-metal nitride powder (LMNP).

First claim

What is claimed is:

1. A method of manufacturing lithium-metal nitride comprising:
suspending a lithium-metal-oxide-powder (LMOP) within a gaseous mixture;
incrementally heating the suspended LMOP to a holding temperature of between 400 and 800 degrees Celsius such that the LMOP reaches the holding temperature;
maintaining the LMOP at the holding temperature for a time period in order for the gaseous mixture and the LMOP to react to form a lithium-metal nitride powder (LMNP); and
degassing the suspended LMOP.

2. The method of claim 1 , further comprising cooling the suspended LMOP to an ambient temperature from the holding temperature.

3. The method of claim 1 , wherein degassing flowing an inert gas over the suspended LMOP.

4. The method of claim 3 , wherein the inert gas includes Argon or Helium.

5. The method of claim 4 , wherein the inert gas does not include Nitrogen.

6. A method of manufacturing lithium-metal nitride comprising:
suspending a lithium-metal-oxide-powder (LMOP) within a gaseous mixture;

incrementally heating the suspended LMOP to a holding temperature of between 400 and 800 degrees Celsius such that the LMOP reaches the holding temperature;
maintaining the LMOP at the holding temperature for a time period in order for the gaseous mixture and the LMOP to react to form a lithium-metal nitride powder (LMNP); and degassing the suspended LMOP within the internal chamber, wherein suspending the LMOP within the gaseous mixture includes feeding the gaseous mixture to a reaction chamber, wherein the reaction chamber includes an outer wall containing an annular gas path therein surrounding an internal chamber configured to enclose the LMOP.

7. The method of claim 6 , further comprising feeding, the gaseous mixture through a porous media located in a bottom portion of the internal chamber in order to suspend the LMOP.

8. The method of claim 1 , further comprising heating the suspended LMOP at a rate of 5 degrees Celsius per minute to 200 degrees Celsius and then 10 to 15 degrees per minute to the holding temperature.

9. The method of claim 8 , further comprising incrementally heating the suspended LMOP to the holding temperature predominantly by convection.

10. The method of claim 1 , further comprising maintaining the holding temperature for between 1 and 10 hours, inclusive.

11. The method of claim 1 , wherein the LMOP consists of a commercially available powder.

12. The method of claim 1 , wherein the LMOP is selected from a group consisting of LiMn 2 O 4 , LiMnO 2 , LiNi 0.8 Co 0.15 Al 0.05 O 2 , LiM 1.5 Ni 0.5 O 4 , or a combination thereof.

13. The method of claim 1 , wherein the LMNP is selected from a group consisting of Li x Mn y-x N, Li x Mn y-x Ni n N, LiMn y-x Ni z N, or a combination thereof.

14. The method of claim 13 , wherein the LMNP is selected from a group consisting of [Li 7.9 MnN 3.2 O 1.6 , Li 7 MnN 4 , Li 2.6 Co 0.2 Cu 0.2 N, Li 2.6 Co 0.4 N, Li 2:5 Co 0:2 Cu 0:1 Ni 0:1 N, or a combination thereof.

15. The method of claim 1 , wherein the gaseous mixture includes gas selected from a group consisting of N 2 , H 2 , He, NH 3 , Ar, or a combination thereof.

Assignees

• Hamilton Sundstrand Corp

Inventors

• Mcgee Randolph Carlton

Classifications

• C01G53/82

  Compounds containing nickel, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• C01G51/82

  Compounds containing cobalt, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• C01G45/22

  Compounds containing manganese, with or without oxygen or hydrogen, and containing two or more other elements · CPC title

• H01M4/1395

  of electrodes based on metals, Si or alloys · CPC title

• B01J8/18

  with fluidised particles {(combustion apparatus with fluidised bed in general F23C10/00; furnaces with fluidised bed F27B15/00)} · CPC title