Use of a transition metal sulphide compound in a positive electrode for solid state batteries

Patent metadata

Field	Value
Publication number	US-12519106-B2
Application number	US-202017765922-A
Country	US
Kind code	B2
Filing date	Oct 1, 2020
Priority date	Oct 1, 2019
Publication date	Jan 6, 2026
Grant date	Jan 6, 2026

Abstract

The present invention generally relates to the use of a transition metal sulphide compound in a positive electrode for solid state batteries, to a transition metal sulphide compound, to a device or a material incorporating said compound, such as a composite material, an electrode, an electrochemical energy storage cell or a device such as an all-solid-state battery. It further relates to a method to manufacture and/or to use such a compound, material or device and to a process to manufacture said compound, material and/or device.

First claim

The invention claimed is:

1 . A method of manufacturing a positive electrode of a solid state battery, comprising providing a transition metal sulphide compound of formula III: Li 1.33-2y/3 M 0.67-y/3 N y S 2 (III) in association or combination with an oxide compound, as an active material for said positive electrode of a solid state battery, wherein MN is a combination of two or more transition metals, Li, M and N have each an atomic content dependent upon y, as shown in formula III, y being a number strictly superior to 0 and not superior to 0.5.

2 . The method according to claim 1 , wherein said transition metals are chosen in the group consisting of Titanium, Iron, Manganese, Nickel, Vanadium and a combination thereof.

3 . The method according to claim 1 , wherein said oxide compound is of the empiric formula A x C c O z wherein A is an alkali, C comprises at least one element from the Group 2 to Group 13, O is oxygen, 0<x<3, c is a number ranging from 1 to 3 and z is equal to x+c.

4 . A composite material comprising a ternary transition metal sulphide compound of formula III: Li 1.33-2y/3 M 0.67-y/3 N y S 2 (III) and oxide compound, wherein MN is a combination of two or more transition metals, Li, M and N have each an atomic content dependent upon y, as shown in formula III, y being a number strictly superior to 0 and not superior to 0.5.

5 . An electrochemical cell comprising at least a positive and a negative electrode in contact with an electrolyte material, wherein said positive electrode comprises, consists or essentially consists of the composite material according to claim 4 .

6 . A solid state battery which comprises at least one electrochemical cell as claimed in claim 5 and external connections.

7 . The solid state battery according to claim 6 , wherein said battery is cyclable in an allowed cut-off voltage range of 1.5-4.5 V vs. Li/Li.

8 . A method of manufacturing a positive electrode of a solid state battery, comprising providing a ternary transition metal sulphide compound of formula III: Li 1.33-2y/3 M 0.67-y/3 N y S 2 (III) as an active material for said positive electrode of a solid state battery, wherein MN is a combination of two or more transition metals, Li, M and N have each an atomic content dependent upon y, as shown in formula III, y being a number strictly superior to 0 and not superior to 0.5.

9 . The method of claim 8 , wherein said transition metal of said ternary transition metal sulphide is chosen in the group consisting of Titanium, Iron, Manganese, Nickel, Vanadium and a combination thereof.

10 . The method according to claim 8 , wherein the method includes mixing said ternary transition metal sulphide compound in a powder form with a solid electrolyte material which is also in a powder form.

11 . A positive electrode for a solid state battery, said electrode comprising a ternary transition metal sulphide of formula III: Li 1.33-2y/3 M 0.67-y/3 N y S 2 (III) and, wherein MN is a combination of two or more transition metals, Li, M and N have each an atomic content dependent upon y, as shown in formula III, y being a number strictly superior to 0 and not superior to 0.5.

12 . An electrochemical cell which comprises at least one positive electrode and one negative electrode in contact with an electrolyte material, wherein said positive electrode is as defined in claim 11 .

13 . A method of manufacturing a positive electrode of a solid state electrochemical cell, comprising providing a ternary transition metal sulphide compound of formula III:
Li 1.33-2y/3 M 0.67-y/3 N y S 2 (III), wherein MN is a combination of two or more transition metals, Li, M and N have each an atomic content dependent upon y, as shown in formula III, y being a number strictly superior to 0 and not superior to 0.5, as an active material of said positive electrode.

14 . An electrochemical cell comprising at least a positive and a negative electrode in contact with a solid electrolyte, wherein said positive electrode comprises, consists or essentially consists of a ternary transition metal sulphide compound of formula III:
Li 1.33-2y/3 M 0.67-y/3 N y S 2 (III), wherein MN is a combination of two or more transition metals, Li, M and N have each an atomic content dependent upon y, as shown in formula III, y being a number strictly superior to 0 and not superior to 0.5.

15 . A solid state battery which comprises at least one electrochemical cell as claimed in claim 14 and external connections.

16 . The composite material according to claim 4 , wherein said transition metal of said transition metal sulphide is chosen in the group consisting of Titanium, Iron, Manganese, Nickel, Vanadium and a combination thereof.

17 . The composite material according to claim 4 , wherein said oxide compound is of the empiric formula A x C c O z wherein A is an alkali, C comprises at least one element from the Group 2 to Group 13, O is oxygen, 0<x<3, c is a number ranging from 1 to 3 and z is equal to x+c.

18 . The positive electrode of claim 11 , wherein said transition metal of said ternary transition metal sulphide is chosen in the group consisting of Titanium, Iron, Manganese, Nickel, Vanadium and a combination thereof.

19 . The positive electrode of claim 11 , wherein said ternary transition metal sulphide compound in a powder form is mixed with a solid electrolyte material which is also in a powder form.

Assignees

• Centre Nat Rech Scient
• College France
• Univ Sorbonne

Inventors

• Tarascon Jean-Marie
• Marchini Florencia

Classifications

• H01M2004/028

  Positive electrodes · CPC title

• H01M10/0525

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

• H01M4/525

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M4/505

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

• Y02E60/10

  Energy storage using batteries · CPC title