Lithium ion conductor, and solid electrolyte, active material, and lithium battery each including the lithium ion conductor

Patent metadata

Field	Value
Publication number	US-9859559-B2
Application number	US-201313938373-A
Country	US
Kind code	B2
Filing date	Jul 10, 2013
Priority date	Jul 11, 2012
Publication date	Jan 2, 2018
Grant date	Jan 2, 2018

Abstract

A lithium ion conductor represented by Formula 1:

Li 1+x+2y Al x Mg y M 2−x−y (PO 4 ) 3   Formula 1

wherein, in Formula 1, M includes at least one of titanium (Ti), germanium (Ge), zirconium (Zr), hafnium (Hf), and tin (Sn), 0<x<0.6, and 0<y<0.2.

First claim

What is claimed is:

1. A solid electrolyte comprising a lithium ion conductor represented by Formula 1:
Li 1+x+2y Al x Mg y M 2−x−y (PO 4 ) 3   Formula 1

wherein, in Formula 1,
M comprises at least one of titanium (Ti), germanium (Ge), zirconium (Zr), hafnium (Hf), and tin (Sn), and
0<x≦0.3, and 0<y≦0.1, and
wherein the aluminum (Al) and the magnesium (Mg) of Formula 1 are substituted at a plurality of M sites of the lithium ion conductor of Formula 1, and
wherein M has an oxidation number of 4, which is constant during migration of lithium ions.

2. The solid electrolyte of claim 1 , wherein M comprises at least one of titanium (Ti) and germanium (Ge).

3. The solid electrolyte of claim 2 , wherein M is titanium (Ti).

4. The solid electrolyte of claim 1 , wherein 0<y≦0.05.

5. The solid electrolyte of claim 1 , wherein the lithium ion conductor is Li 1.2 Al 0.1 Mg 0.05 Ti 1.85 (PO 4 ) 3 , Li 1.3 Al 0.2 Mg 0.05 Ti 1.75 (PO 4 ) 3 , Li 1.4 Al 0.3 Mg 0.05 Ti 1.65 (PO 4 ) 3 , or Li 1.4 Al 0.2 Mg 0.1 Ti 1.7 (PO 4 ) 3 .

6. An electrode active material for a lithium battery, the electrode active material comprising:
a core comprising a material capable of intercalating and deintercalating lithium ions; and
a shell disposed on at least a portion of a surface of the core,
wherein the shell comprises the solid electrolyte comprising the lithium ion conductor of claim 1 .

7. The electrode active material for a lithium battery of claim 6 , wherein the lithium ion conductor is Li 1.2 Al 0.1 Mg 0.05 Ti 1.85 (PO 4 ) 3 , Li 1.3 Al 0.2 Mg 0.05 Ti 1.75 (PO 4 ) 3 , Li 1.4 Al 0.3 Mg 0.05 Ti 1.65 (PO 4 ) 3 , or Li 1.4 Al 0.2 Mg 0.1 Ti 1.7 (PO 4 ) 3 .

8. An all-solid-state lithium battery comprising:
a cathode including a cathode active material;
an anode including an anode active material; and
the solid electrolyte including the lithium ion conductor of claim 1 .

9. The all-solid-state lithium battery of claim 8 , wherein at least one of the cathode and the anode further comprises the solid electrolyte comprising the lithium ion conductor of claim 1 .

10. The all-solid-state lithium battery of claim 8 , wherein the lithium ion conductor is Li 1.2 Al 0.1 Mg 0.05 Ti 1.85 (PO 4 ) 3 , Li 1.3 Al 0.2 Mg 0.05 Ti 1.75 (PO 4 ) 3 , Li 1.4 Al 0.3 Mg 0.05 Ti 1.65 (PO 4 ) 3 , or Li 1.4 Al 0.2 Mg 0.1 Ti 1.7 (PO 4 ) 3 .

11. A lithium battery comprising:
a cathode including a cathode active material;
an anode including an anode active material; and
an organic electrolyte solution,
wherein at least one of the cathode, the anode, and the organic electrolyte solution further comprises the lithium ion conductor of claim 1 .

12. The lithium battery of claim 11 , wherein the lithium ion conductor is disposed in the cathode, and
the cathode has a layered structure including
a cathode current collector,
a cathode active material layer including the cathode active material, and
a protective layer comprising the lithium ion conductor,

wherein the cathode current collector, the cathode active material layer, and the protective layer are disposed sequentially upon one another.

13. The lithium battery of claim 11 , wherein the lithium ion conductor is disposed in the cathode, and
wherein the cathode active material comprises:
a core including a material capable of intercalating and deintercalating lithium ions; and
a shell disposed on at least a portion of a surface of the core, wherein the shell comprises the lithium ion conductor.

14. The lithium battery of claim 11 , wherein the lithium ion conductor is disposed in the anode, and
the anode has a layered structure including
an anode current collector,
an anode active material layer including the anode active material, and
a protective layer comprising the lithium ion conductor, wherein the anode current collector, the anode active material layer, and the protective layer are disposed sequentially upon one another.

15. The lithium battery of claim 11 , wherein the lithium ion conductor is disposed in the anode, and
wherein the anode active material comprises:
a core including a material capable of intercalating and deintercalating lithium ions; and
a shell disposed on at least a portion of a surface of the core, wherein the shell comprises the lithium ion conductor.

16. A lithium air battery comprising:
a cathode comprising at least one of an oxygen-oxidation catalyst and an oxygen-reduction catalyst;
an anode including lithium;
an electrolyte disposed between the cathode and the anode; and
an ion conductive membrane disposed between the anode and the electrolyte,
wherein the ion conductive membrane comprises the lithium ion conductor of claim 1 .

Assignees

• Samsung Electronics Co Ltd

Inventors

• Kim Tae-Young
• Park Young-Sin
• Baek Seung-Wook
• Lee Jae-Myung

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M6/168

  by additives · CPC title

• H01M4/5825 Primary

  Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title

• H01M6/185

  with oxides, hydroxides or oxysalts as solid electrolytes · CPC title

• H01M10/0562 Primary

  Solid materials · CPC title