Lithiated material

Patent metadata

Field	Value
Publication number	US-11535524-B2
Application number	US-201916575436-A
Country	US
Kind code	B2
Filing date	Sep 19, 2019
Priority date	Sep 19, 2018
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A material of formula LiaTib(AxS3-x)c wherein A is a metalloid element chosen from selenium, tellurium and mixtures thereof, and the stoichiometric coefficients a, b, c and x are such that0<x<2.2;0.4≤a≤4.5;0.9≤b≤1.1; and0.9≤c≤1.1.

First claim

The invention claimed is:

1. A material of formula Li a Ti b (A x S 3-x ) c wherein A is a metalloid element chosen from selenium, tellurium and mixtures thereof, and the stoichiometric coefficients a, b, c and x are such that
0<x<2.2;
0.4≤a≤4.5;
0.9≤b≤1.1; and
0.9≤c≤1.1.

2. The material according to claim 1 , wherein the metalloid element A is selenium.

3. The material according to claim 1 , wherein the stoichiometric coefficient x is less than or equal to 1.2.

4. The material according to claim 1 , wherein the stoichiometric coefficient x is equal to 1.

5. The material according to claim 1 , wherein the stoichiometric coefficient a is equal to 2 and/or the stoichiometric coefficient b is equal to 1 and/or the stoichiometric coefficient c is equal to 1.

6. The material according to claim 5 , wherein the stoichiometric coefficient a is equal to 2 and the stoichiometric coefficient b is equal to 1 and the stoichiometric coefficient c is equal to 1.

7. The material according to claim 1 , having an NaCl-type crystallographic structure.

8. The material according to claim 1 , having a maximum reversible capacity of greater than 200 mAh·g −1 .

9. The material according to claim 8 , having a maximum reversible capacity of greater than 230 mAh·g −1 .

10. A powder comprising particles formed of the material according to claim 1 .

11. A battery cathode comprising the material according to claim 1 .

12. A battery comprising a battery cathode according to claim 11 .

13. The battery according to claim 12 , chosen from the group consisting of a lithium-ion battery and a lithium battery.

14. A lithium-ion battery according to claim 13 , having a capacity retention at fifteen cycles of greater than or equal to 75%.

15. The lithium-ion battery according to claim 14 , having a capacity retention at fifteen cycles of greater than or equal to 85%.

16. The lithium-ion battery according to claim 15 , having a capacity retention at fifteen cycles of greater than or equal to 90%.

17. A process for manufacturing a material according to claim 1 , comprising a step of milling raw materials, the raw materials being chosen so as to obtain, at the end of the milling step, the material according to claim 1 .

18. The process according to claim 17 , wherein the raw materials comprise a powder of titanium particles, a powder of selenium particles.

19. The process according to claim 18 , wherein the raw materials further comprise a powder of lithium sulfide particles.

20. The process according to claim 17 , the milling step being carried out in a wet environment in a solvent.

21. The process according to claim 20 , the solvent being hexane.

22. The process according to claim 21 , the purity of the solvent being greater than 99.5%.

23. The process according to claim 17 , the milling step being carried out in a reducing atmosphere.

24. The process according to claim 17 , the milling step being carried out in an inert atmosphere.

Assignees

• Commissariat Energie Atomique

Inventors

• Celasun Yagmur
• Colin Jean-Francois
• Martinet Sebastien
• Peralta David

Classifications

• C01P2002/72

  by d-values or two theta-values, e.g. as X-ray diagram · CPC title

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• B22F2009/042

  using a particular milling fluid · CPC title

• H01M4/5815

  Sulfides · CPC title

• B22F2301/054

  Alkali metals, i.e. Li, Na, K, Rb, Cs, Fr · CPC title