# US 2014/0193695 A1 · Lithium-ion conducting oxide, solid electrolyte secondary battery and battery pack

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- Number: US 2014/0193695 A1
- Document ID: US20140193695A1
- Status: Published application
- Kind: A1
- Application number: 14/209,178
- Filed: 2014-03-13
- Published: 2014-07-10
- Earliest claimed: 2012-03-13
- Assignees: Kabushiki Kaisha Toshiba
- Applicants: Kabushiki Kaisha Toshiba
- Inventors: Keigo HOSHINA; Hiroki INAGAKI; Norio TAKAMI
- Web page: https://patentgrep.com/patent/US20140193695A1

## CPC

- H01M 10/0562: Solid materials
- H01M 4/485: of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence)
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- Y02E 60/10: Energy storage using batteries
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

According to one embodiment, a solid electrolyte secondary battery includes a positive electrode, a negative electrode and a solid electrolyte layer. The solid electrolyte layer includes a lithium-ion conducting oxide containing at least one element selected from the group consisting of B, N, F and S, wherein a total content of the element in the lithium-ion conducting oxide is 0.05% by mass or more and 1% by mass or less.

## Claims

### Claim 1

A lithium-ion conducting oxide including at least one element selected from the group consisting of B, N, F and S, wherein a total content of the element in the lithium-ion conducting oxide is 0.05% by mass or more and 1% by mass or less.

### Claim 2 (depends on 1)

The lithium-ion conducting oxide of claim 1, wherein the element exists at a grain boundary of the lithium-ion conducting oxide.

### Claim 3 (depends on 1)

The lithium-ion conducting oxide of claim 1, which has a perovskite structure and is expressed by Li3xLa2/3-xTiO3, where x is 0<x<⅔.

### Claim 4 (depends on 1)

The lithium-ion conducting oxide of claim 1, which has a garnet structure and is expressed by Li5+xLa3M2-xZrxO12, where M is at least one of Nb and Ta, and x is 0≦x≦2.

### Claim 5

A lithium-ion conducting oxide including at least one element selected from H and C, wherein a total content of the element in the lithium-ion conducting oxide is 0.03% by mass or more and 0.2% by mass or less.

### Claim 6 (depends on 5)

The lithium-ion conducting oxide of claim 5, wherein the element exists at a grain boundary of the lithium-ion conducting oxide.

### Claim 7 (depends on 5)

The lithium-ion conducting oxide of claim 5, which has a perovskite structure and is expressed by Li3xLa2/3-xTiO3, where x is 0<x<⅔.

### Claim 8 (depends on 5)

The lithium-ion conducting oxide of claim 5, which has a garnet structure and is expressed by Li5+xLa3M2-xZrxO12, where M is at least one of Nb and Ta, and x is 0≦x≦2.

### Claim 9

A solid electrolyte secondary battery comprising a positive electrode, a negative electrode and a solid electrolyte layer,
wherein the solid electrolyte layer comprises a lithium-ion conducting oxide including at least one element selected from the group consisting of B, N, F and S, a total content of the element in the lithium-ion conducting oxide being 0.05% by mass or more and 1% by mass or less.

### Claim 10 (depends on 9)

The solid electrolyte secondary battery of claim 9, wherein the negative electrode comprises an active material, the active material being a titanium composite oxide.

### Claim 11

A solid electrolyte secondary battery comprising a positive electrode, a negative electrode and a solid electrolyte layer,
wherein the solid electrolyte layer comprises a lithium-ion conducting oxide including at least one element selected from H and C, a total content of the element in the lithium-ion conducting oxide being 0.05% by mass or more and 0.2% by mass or less.

### Claim 12 (depends on 11)

The solid electrolyte secondary battery of claim 11, wherein the negative electrode comprises an active material, the active material being a titanium composite oxide.

### Claim 13 (depends on 9)

A battery pack comprising the solid electrolyte secondary battery according to claim 9.

### Claim 14 (depends on 11)

A battery pack comprising the solid electrolyte secondary battery according to claim 11.