Negative electrode active material based on iron and lithium hydroxysulfide

Patent metadata

Field	Value
Publication number	US-12095086-B2
Application number	US-201917415363-A
Country	US
Kind code	B2
Filing date	Dec 18, 2019
Priority date	Dec 18, 2018
Publication date	Sep 17, 2024
Grant date	Sep 17, 2024

Abstract

A negative electrode active material for a lithium-ion battery has the following formula (I): Li1-xOHFe1+xS (I). x varies from 0.00 to 0.25, preferably from 0.05 to 0.20.

First claim

The invention claimed is:

1. A negative electrode, comprising:
a negative electrode active material of formula (I):
Li 1−x OHFe 1+x S   (I),

wherein x is in a range of from 0.00 to 0.25.

2. The negative electrode of claim 1 , wherein, in the negative electrode active material, x is in a range of from 0.05 to 0.20.

3. The negative electrode of claim 1 , wherein, in the negative electrode active material, x is 0.05.

4. The negative electrode of claim 1 , further comprising:
a conductive compound.

5. The negative electrode of claim 4 , wherein the conductive compound comprises metal particles and/or carbon.

6. The negative electrode of claim 4 , wherein the conductive compound is carbon.

7. The negative electrode of claim 6 , wherein the carbon is in the form of graphite, carbon black, carbon fibers, carbon nanowires, carbon nanotubes, and/or carbon nanospheres.

8. The negative electrode of claim 6 , wherein the carbon is carbon black.

9. The negative electrode of claim 4 , wherein the conductive compound is present in a range of from 3 to 30 wt. %, relative to total negative electrode weight.

10. The negative electrode of claim 9 , wherein the conductive compound is present in a range of from 3 to 20 wt. %.

11. The negative electrode of claim 1 , wherein the active material compound is present in a range of from 50 to 97 wt. %, relative to total negative electrode weight.

12. The negative electrode of claim 1 , wherein the active material compound is present in a range of from 80 to 97 wt. %, relative to total negative electrode weight.

13. A lithium-ion battery, comprising:
the negative electrode of claim 1 .

14. The negative electrode of claim 1 , wherein, in the negative electrode active material, x is in a range of from more than 0.00 to no more than 0.25.

15. The negative electrode of claim 1 , wherein the negative electrode active material is in the form of plates having lateral dimensions in a range of from 0.5 to 3 μm and/or a thickness in a range of from 90 to 110 nm.

16. A negative electrode comprising a negative electrode active material suitable for a lithium-ion battery, comprising, based on total negative electrode active material weight:
a negative electrode active compound of formula (I) in at least 80 wt. %:
Li 1−x OHFe 1+x S   (I),

wherein x is in a range of from 0.00 to 0.25.

17. The negative electrode of claim 16 , further comprising:
graphite, carbon black, carbon fibers, carbon nanowires, carbon nanotubes, and/or carbon nanospheres.

18. A method for making the negative electrode of claim 1 , the method comprising:
(a) adding iron and sulfur in an aqueous solution of LiOH at a concentration in a range of from 2 to 6 mol/L, to obtain a mixture;
(b) heating the mixture obtained upon completion of the adding (a) to a temperature is in a range of from 130 to 190° C., to obtain an active material;
(c) recovering the negative electrode active material compound; and
(d) combining the negative electrode active material with the negative electrode.

19. The method of claim 18 , wherein the concentration is in a range of from 4 to 6 mol/L.

Assignees

• Renault Sas
• Centre Nat Rech Scient
• Ecole Nat Superieure De Chimie De Paris

Inventors

• Barboux Philippe
• Chakir Mohamed
• Giaume Domitille
• Mir Caroline

Classifications

• H01M2004/027

  Negative electrodes · CPC title

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/625

  Carbon or graphite · CPC title

• H01M4/136

  Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title

• C01P2006/40

  Electric properties · CPC title