Active material, nonaqueous electrolyte battery, and battery pack

Patent metadata

Field	Value
Publication number	US-9601769-B2
Application number	US-201514660325-A
Country	US
Kind code	B2
Filing date	Mar 17, 2015
Priority date	Mar 18, 2014
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

According to one embodiment, there is provided an active material. The active material contains a composite oxide represented by a following general formula:

the general formula: Li x (Nb 1−y Ta y ) 2−z Ti 1+0.5z M 0.5z O 7 ,
in which 0≦x≦5, 0≦y≦1, and 0<z≦1, and M is at least one metal element selected from the group consisting of Mo and W.

First claim

What is claimed is:

1. An active material comprising a composite oxide of formula:
Li x (Nb 1−y Ta y ) 2−z Ti 1+0.5z M 0.5z O 7 ,
wherein 0≦x≦5, 0≦y≦1, and 0.4≦z≦1, and M is at least one metal element selected from the group consisting of Mo and W.

2. The active material according to claim 1 , wherein a specific surface area of the composite oxide is from 0.1 to 100 m 2 /g.

3. A nonaqueous electrolyte battery comprising:
a negative electrode comprising the active material according to claim 1 ;
a positive electrode; and
a nonaqueous electrolyte.

4. A battery pack comprising at least one nonaqueous electrolyte battery,
wherein the at least one nonaqueous electrolyte battery comprises a negative electrode comprising the active material according to claim 1 , a positive electrode and a nonaqueous electrolyte.

5. The battery pack according to claim 4 , comprising a plurality of nonaqueous electrolyte batteries,
wherein each of the plurality of nonaqueous electrolyte batteries comprises a negative electrode comprising the active material according to claim 1 , a positive electrode and a nonaqueous electrolyte.

6. The battery pack according to claim 5 , wherein the plurality of the nonaqueous electrolyte batteries are electrically connected to each other in series.

7. The battery pack according to claim 5 , wherein the plurality of the nonaqueous electrolyte batteries are electrically connected to each other in parallel.

8. The battery pack according to claim 5 , wherein the plurality of the nonaqueous electrolyte batteries are electrically connected to each other in a combination of in series and in parallel.

9. The battery pack according to claim 5 , wherein the plurality of the nonaqueous electrolyte batteries are electrically connected to each other in series, in parallel or in a combination thereof.

10. The battery pack according to claim 4 , further comprising:
a protective circuit configured to detect a voltage of the nonaqueous electrolyte battery.

11. The battery pack according to claim 1 , wherein x is 0, y is 0 and z is 0.4.

Assignees

• Toshiba Kk

Inventors

• Harada Yasuhiro
• Takami Norio
• Yoshida Yorikazu
• Ise Kazuki
• Yoshima Kazuomi

Classifications

• H01M10/486

  for measuring temperature · CPC title

• H01M50/293

  characterised by the material · CPC title

• H01M50/116

  characterised by the material · CPC title

• H01M50/264

  for cells or batteries, e.g. straps, tie rods or peripheral frames · CPC title

• H01M50/298

  characterised by the wiring of battery packs · CPC title