Oxyhalide lithium-ion conductor

Patent metadata

Field	Value
Publication number	US-2022267166-A1
Application number	US-202217732736-A
Country	US
Kind code	A1
Filing date	Apr 29, 2022
Priority date	Apr 29, 2022
Publication date	Aug 25, 2022
Grant date	—

Abstract

A lithium-ion conductor includes an inorganic compound with a chemical composition of Li 2−3x+y−z Fe x O y (OH) 1−y Cl 1−z , where x is greater than or equal to 0 and less than 1, y is greater than or equal to 0 and less than or equal 1, and z is greater than or equal to 0 and less than or equal 0.25. Also, the inorganic compound has or exhibits a thermal decomposition temperature greater than 390° C., an ionic conductivity greater than about 1.0×10 −4 S/cm at 25° C., and has a crystal structure that reflects or exhibits x-ray diffraction peaks with a 2θ between about 22.12° and about 24.12°, between about 31.97° and about 33.97°, between about 39.55° and about 41.55°, between about 46.46° and about 48.46°, between about 57.77° and about 59.77°, and between about 68.04° and about 70.04°.

First claim

What is claimed is:

1 . A lithium-ion conductor comprising:
an inorganic compound comprising:
a chemical composition of Li 2−3x+y−z Fe x O y (OH) 1−y Cl 1−z , where x is greater than or equal to 0 and less than 1, y is greater than or equal to 0 and less than or equal 1, and z is greater than or equal to 0 and less than or equal 0.25; and
x-ray diffraction peaks with a 2θ between about 22.12° and about 24.12°, between about 31.97° and about 33.97°, between about 39.55° and about 41.55°, between about 46.46° and about 48.46°, between about 57.77° and about 59.77°, and between about 68.04° and about 70.04°.

2 . The lithium-ion conductor according to claim 1 , wherein the inorganic 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).

3 . The lithium-ion conductor according to claim 1 , wherein the inorganic compound has a thermal decomposition temperature greater than 390° C.

4 . The lithium-ion conductor according to claim 1 , wherein the inorganic compound comprises an ionic conductivity greater than about 1.0×10 −4 S/cm at 25° C.

5 . The lithium-ion conductor according to claim 1 , wherein the inorganic compound comprises an ionic conductivity greater than about 2.0×10 −4 S/cm at 40° C.

6 . The lithium-ion conductor according to claim 1 , wherein the inorganic compound comprises an ionic conductivity greater than about 5.0×10 −4 S/cm at 60° C.

7 . The lithium-ion conductor according to claim 1 , wherein the inorganic compound comprises an ionic conductivity greater than about 1.0×10 −3 S/cm at 80° C.

8 . The lithium-ion conductor according to claim 1 , wherein the inorganic compound comprises an ionic conductivity greater than about 2.5×10 −3 S/cm at 100° C.

9 . The lithium-ion conductor according to claim 1 , wherein the inorganic compound comprises an ionic conductivity at least one order of magnitude of greater than an ionic conductivity of Li 3 OCl.

10 . The lithium-ion conductor according to claim 1 further comprising a positive electrode coating layer comprising the inorganic compound.

11 . The lithium-ion conductor according to claim 1 further comprising a battery comprising the inorganic compound.

12 . A lithium-ion conductor comprising:
an inorganic compound comprising:
a chemical composition of Li 2−3x+y−z Fe x O y (OH) 1−y Cl 1−z , where x is greater than or equal to 0 and less than 1, y is greater than or equal to 0 and less than or equal 1, and z is greater than or equal to 0 and less than or equal 0.25;
x-ray diffraction peaks with a 2θ between about 22.12° and about 24.12°, between about 31.97° and about 33.97°, between about 39.55° and about 41.55°, between about 46.46° and about 48.46°, between about 57.77° and about 59.77°, and between about 68.04° and about 70.04°; and
a thermal decomposition temperature greater than 390° C.

13 . The lithium-ion conductor according to claim 12 , wherein the inorganic 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).

14 . The lithium-ion conductor according to claim 12 , wherein the inorganic compound comprises at least one of an ionic conductivity greater than about 2.0×10 −4 S/cm at 40° C., an ionic conductivity greater than about 5.0×10 −4 S/cm at 60° C., an ionic conductivity greater than about 1.0×10 −3 S/cm at 80° C., and an ionic conductivity greater than about 2.5×10 −3 S/cm at 100° C.

15 . The lithium-ion conductor according to claim 12 further comprising a positive electrode coating layer comprising the inorganic compound.

16 . The lithium-ion conductor according to claim 12 further comprising a battery comprising the inorganic compound.

17 . A lithium-ion conductor comprising:
an inorganic compound comprising:
a chemical composition of Li 2−3x+y−z Fe x O y (OH) 1−y Cl 1−z , where x is greater than or equal to 0 and less than 1, y is greater than or equal to 0 and less than or equal 1, and z is greater than or equal to 0 and less than or equal 0.25;
x-ray diffraction peaks with a 2θ between about 22.12° and about 24.12°, between about 31.97° and about 33.97°, between about 39.55° and about 41.55°, between about 46.46° and about 48.46°, between about 57.77° and about 59.77°, and between about 68.04° and about 70.04°;
a thermal decomposition temperature greater than 390° C.; and
an ionic conductivity greater than about 1.0×10 −4 S/cm at 25° C.

18 . The lithium-ion conductor according to claim 17 , wherein the inorganic 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).

19 . The lithium-ion conductor according to claim 17 further comprising a positive electrode coating layer comprising the inorganic compound.

20 . The lithium-ion conductor according to claim 17 further comprising a battery comprising the inorganic compound.

Assignees

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

Inventors

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

Classifications

• C01G49/009

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

• C01P2006/40

  Electric properties · CPC title

• C01P2002/72

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

• H01M10/0525 Primary

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

• H01M10/0562

  Solid materials · CPC title