Active material, nonaqueous electrolyte battery, and battery pack

Patent metadata

Field	Value
Publication number	US-9812704-B2
Application number	US-201615066663-A
Country	US
Kind code	B2
Filing date	Mar 10, 2016
Priority date	Mar 13, 2015
Publication date	Nov 7, 2017
Grant date	Nov 7, 2017

Abstract

According to one embodiment, an active material is provided. This active material includes a mixed phase of a phase of titanium-including composite oxide and a phase of titanium oxide. The titanium-including composite oxide has a crystal structure belonging to a space group Cmca or a space group Fmmm.

First claim

What is claimed is:

1. An active material particle which comprises a mixed phase of a phase of titanium oxide and a phase of titanium-including composite oxide having a crystal structure belonging to a space group Cmca or a space group Fmmm.

2. The active material particle of claim 1 , wherein a diffraction pattern of the active material particle obtained by wide-angle X-ray diffraction comprises a main peak A of the phase of titanium-including composite oxide, and a main peak B of the phase of titanium oxide, and
a ratio Z (=Y/X) of an intensity Y of the main peak B to an intensity X of the main peak A is from 0.01 to 1.3.

3. The active material particle of claim 1 , wherein the titanium-including composite oxide has a crystal structure belonging to a space group Cmca, and the titanium-including composite oxide is represented by a general formula Li (2+x) MTi 6 O 14 , wherein M is at least one selected from Sr and Ba, and x is within a range of 0≦x≦6.

4. The active material particle of claim 1 , wherein the titanium-including composite oxide has a crystal structure belonging to a space group Fmmm, and
the titanium-including composite oxide is represented by a general formula Li (2+y) Na 2 Ti 6 O 14 , wherein y is within a range of 0≦y≦6.

5. The active material particle of claim 1 , wherein the titanium oxide has an anatase type structure.

6. The active material particle of claim 1 , further comprising a carbon-including layer formed on at least a portion of a surface of the active material particle.

7. The active material particle of claim 1 , which is a battery active material.

8. A nonaqueous electrolyte battery comprising:
a positive electrode;
a negative electrode comprising a negative electrode active material, the negative electrode active material comprising the active material particle of claim 1 ; and
a nonaqueous electrolyte.

9. The nonaqueous electrolyte battery of claim 8 , wherein the positive electrode comprises a positive electrode active material, and
the positive electrode active material comprises an iron-including phosphorus oxide having an olivine structure.

10. The nonaqueous electrolyte battery of claim 8 , wherein the positive electrode comprises a positive electrode active material, and
the positive electrode active material comprises at least one selected from the group consisting of a lithium manganese composite oxide having a spinel structure, and a lithium nickel manganese cobalt composite oxide having a layered structure.

11. A battery pack comprising the nonaqueous electrolyte battery of claim 8 .

12. The battery pack of claim 11 , further comprising a protective circuit and an energizing terminal.

13. The battery pack of claim 11 , comprising plural of the nonaqueous electrolyte batteries, the nonaqueous electrolyte batteries being electrically connected in series, in parallel, or in combination of in series and in parallel.

Assignees

• Toshiba Kk

Inventors

• Inagaki Hiroki
• Takami Norio

Classifications

• Y02T10/7011

  Cross-Sectional Technologies · mapped topic

• H01M2004/027

  Negative electrodes · CPC title

• H01M4/625

  Carbon or graphite · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M4/485 Primary

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title