Inorganic oxychloride ionic conductors

Patent metadata

Field	Value
Publication number	US-11522218-B1
Application number	US-202217732644-A
Country	US
Kind code	B1
Filing date	Apr 29, 2022
Priority date	Apr 29, 2022
Publication date	Dec 6, 2022
Grant date	Dec 6, 2022

Abstract

An ionic conductor includes an inorganic oxychloride compound with a chemical composition of (Fe 1-x M x )O 1-y (OH) y Cl 1-x where M is selected from at least one of Mg and Ca, and x is greater than 0 and less than or equal to 0.25, y is greater than or equal to 0 and less than or equal to 0.25. The inorganic oxychloride compound has a thermal decomposition start temperature of about 410° C. and x-ray diffraction peaks (2θ) between about 20.79° and about 22.79°, between about 30.03° and about 32.03°, between about 39.47° and about 41.47°, and between about 76.44° and about 78.44°.

First claim

What is claimed is:

1. An ionic conductor comprising:
an inorganic oxychloride compound comprising:
a chemical composition of (Fe 1-x M x )O 1-y (OH) y Cl 1-x where M is selected from at least one of Mg and Ca, and x is greater than 0 and less than or equal to 0.25, y is greater than or equal to 0 and less than or equal to 0.25; and
x-ray diffraction peaks with a 2θ between about 20.79° and about 22.79°, between about 30.03° and about 32.03°, between about 39.47° and about 41.47°, and between about 76.44° and about 78.44°.

2. The ionic conductor according to claim 1 , wherein the inorganic oxychloride compound has a thermal decomposition start temperature of about 410° C.

3. The ionic conductor according to claim 1 further comprising a Li-doped solid-state electrolyte with the inorganic oxychloride compound.

4. The ionic conductor according to claim 3 , wherein the Li-doped solid-state electrolyte comprises an ionic conductivity greater than or equal to 5.0×10 −6 S/cm and less than or equal to about 2.0×10 −5 S/cm at 25° C.

5. The ionic conductor according to claim 3 , wherein the Li-doped solid-state electrolyte comprises an ionic conductivity greater than or equal to 2.5×10 −5 S/cm and less than or equal to about 4.5×10 −5 S/cm at 40° C.

6. The ionic conductor according to claim 3 , wherein the Li-doped solid-state electrolyte comprises an ionic conductivity greater than or equal to 7.5×10 −5 S/cm and less than or equal to about 9.5×10 −5 S/cm at 60° C.

7. The ionic conductor according to claim 3 , wherein the Li-doped solid-state electrolyte comprises an ionic conductivity greater than or equal to 1.0×10 −4 S/cm and less than or equal to about 3.0×10 −4 S/cm at 80° C.

8. The ionic conductor according to claim 3 , wherein the Li-doped solid-state electrolyte comprises an ionic conductivity greater than or equal to 2.5×10 −4 S/cm and less than or equal to about 4.5×10 −4 S/cm at 100° C.

9. The ionic conductor according to claim 1 , wherein the inorganic oxychloride compound further comprises at least one of FeCl 3 , FeCl 3 (6H 2 O), Fe(OH) 3 , FeO, Fe 2 O 3 , Fe 3 O 4 , MgCl 2 , MgCl 2 (4H 2 O), MgO, CaO, and Ca(OH).

10. The ionic conductor according to claim 1 further comprising a positive electrode with a coating layer comprising the inorganic oxychloride compound.

11. An ionic conductor comprising:
an inorganic oxychloride compound comprising:
a chemical composition of (Fe 1-x M x )O 1-y (OH) y Cl 1-x and where M is selected from at least one of Mg and Ca, and x is greater than 0 and less than or equal to 0.25, y is greater than or equal to 0 and less than or equal to 0.25;
x-ray diffraction peaks with a 2θ between about 20.79° and about 22.79°, between about 30.03° and about 32.03°, between about 39.47° and about 41.47°, and between about 76.44° and about 78.44°; and
a thermal decomposition start temperature of about 410° C.

12. The ionic conductor according to claim 11 , wherein the inorganic oxychloride compound further comprises at least one of FeCl 3 , FeCl 3 (6H 2 O), Fe(OH) 3 , FeO, Fe 2 O 3 , Fe 3 O 4 , MgCl 2 , MgCl 2 (4H 2 O), MgO, CaO, and Ca(OH).

13. A method comprising:
mixing together two or more chloride containing reagents;
dissolving the mixed two or more chloride containing reagents in a liquid; and
heating the liquid with the dissolved two or more chloride containing reagents such that an inorganic oxychloride compound precipitates and forms particles of (Fe 1-x M x )O 1-y (OH) y Cl 1-x where M is selected from at least one of Mg and Ca, and x is greater than 0 and less than or equal to 0.25, y is greater than or equal to 0 and less than or equal to 0.2, and x-ray diffraction peaks of the (Fe 1-x M x )O 1-y (OH) y Cl 1-x particles include a 2θ between about 20.79° and about 22.79°, between about 30.03° and about 32.03°, between about 39.47° and about 41.47°, and between about 76.44° and about 78.44°.

14. The method according to claim 13 , wherein the two or more chloride containing reagents include FeCl 3 and at least one of MgCl 2 and CaCl 2 .

15. The method according to claim 14 , wherein the liquid is water.

16. The method according to claim 15 , wherein the water with the dissolved two or more chloride containing reagents is heated to a temperature above 100° C.

17. The method according to claim 16 further comprising mixing the particles of (Fe 1-x M x )O 1-y (OH) y Cl 1-x with a Li salt and forming a Li-doped solid-state electrolyte.

18. The method according to claim 17 , wherein the Li salt is LiCl.

19. The method according to claim 18 , wherein the Li-doped solid-state electrolyte comprises an ionic conductivity greater than or equal to 5.0×10 −6 S/cm and less than or equal to about 2.0×10 −5 S/cm at 25° C.

20. The method according to claim 13 , wherein the inorganic oxychloride compound further comprises at least one of FeCl 3 , FeCl 3 (6H 2 O), Fe(OH) 3 , FeO, Fe 2 O 3 , Fe 3 O 4 , MgCl 2 , MgCl 2 (4H 2 O), MgO, CaO, and Ca(OH).

Assignees

• Toyota Eng & Mfg North America
• Toyota Motor Co Ltd

Inventors

• Ota Shingo
• Sugiura Ryuta
• Arthur Timothy S
• Singh Nikhilendra

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title

• C01G49/009 Primary

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

• C01P2002/88

  by thermal analysis data, e.g. TGA, DTA, DSC · CPC title

• H01M2300/008

  Halides · CPC title