Battery active material, nonaqueous electrolyte battery and battery pack

Patent metadata

Field	Value
Publication number	US-9240590-B2
Application number	US-201213409754-A
Country	US
Kind code	B2
Filing date	Mar 1, 2012
Priority date	Mar 22, 2011
Publication date	Jan 19, 2016
Grant date	Jan 19, 2016

Abstract

According to one embodiment, a battery active material includes a complex oxide containing Nb and Ti and an element M. In the active material, the molar ratio (M/Ti) of the element M to Ti satisfies the following formula (I): 0<M/Ti≦0.5 (I). In the complex oxide containing Nb and Ti, the molar ratio (Nb/Ti) of Nb to Ti satisfies the following formula (II): 0≦Nb/Ti≦5 (II). The element M is at least one selected from the group consisting of B, Na, Mg, Al, Si, S, P, K, Ca, Mo, W, Cr, Mn, Co, Ni, and Fe.

First claim

What is claimed is:

1. A battery active material comprising a complex oxide of formula:
Li x TiNb 2−y (Mo 0.75y Mg 0.25y )O 7+δ
wherein
x is from 0 to 5,
y is from 0.01 to 0.5, and
δ is from −0.3 to 0.3.

2. The battery active material according to claim 1 , wherein a melting point of the complex oxide is 1350° C. or less.

3. The battery active material according to claim 1 , wherein the complex oxide comprises a monoclinic crystal structure.

4. The battery active material according to claim 1 , wherein a BET specific surface area of the complex oxide is from 0.1 m 2 /g to less than 100 m 2 /g.

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

6. The battery according to claim 5 , wherein the negative electrode further comprises a battery active material selected from the group consisting of Ti dioxide having an anatase structure, lithium titanate having a ramsdelite structure and lithium titanate having a spinel structure.

7. The battery according to claim 5 , wherein the positive electrode comprises a positive electrode active material selected from the group consisting of manganese dioxide, iron oxide, copper oxide, and nickel oxide impregnated with lithium, lithium-manganese composite oxide, lithium-nickel composite oxide, lithium-cobalt composite oxide, lithium-nickel-cobalt composite oxide, lithium-manganese-cobalt composite oxide, lithium-manganese-nickel composite oxide having a spinel structure, lithium-phosphorous oxide having an olivine structure, iron sulfate, vanadium oxide and lithium-nickel-cobalt-manganese composite oxide.

8. The battery according to claim 5 , wherein the negative electrode and positive electrode are accommodated in a container.

9. The battery according to claim 8 , wherein the container comprises a laminate film having a thickness of 0.5 mm.

10. The battery according to claim 8 , wherein the container is a metal container having a thickness of 1 mm or less.

11. A battery pack comprising the nonaqueous electrolyte battery according to claim 5 .

Assignees

• Harada Yasuhiro
• Takami Norio
• Inagaki Hiroki
• Yoshida Yorikazu
• Toshiba Kk

Inventors

• Harada Yasuhiro
• Takami Norio
• Inagaki Hiroki
• Yoshida Yorikazu

Classifications

• H01M50/107

  having curved cross-section, e.g. round or elliptic (H01M50/103, H01M50/109, H01M50/11 take precedence) · CPC title

• H01M50/109

  of button or coin shape · CPC title

• H01M50/103

  prismatic or rectangular (H01M50/109, H01M50/11 take precedence) · CPC title

• H01M50/105

  Pouches or flexible bags · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title