Active material, nonaqueous electrolyte battery, battery pack and vehicle

Patent metadata

Field	Value
Publication number	US-2017069910-A1
Application number	US-201615261398-A
Country	US
Kind code	A1
Filing date	Sep 9, 2016
Priority date	Sep 9, 2015
Publication date	Mar 9, 2017
Grant date	—

Abstract

According to one embodiment, there is provided an active material. The active material includes a composite oxide. The composite oxide has a monoclinic crystal structure. The composite oxide is represented by a general formula of Li w Na 4-x M1 y Ti 6-z M2 z O 14+δ . In the general formula, the M1 is at least one element selected from the group consisting of Rb, Cs, K and H; the M2 is at least one metallic element selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Fe, Co, Mn and Al; w is within a range of 0≦w<12; x is within a range of 0<x<4; y is within a range of 0≦y<2; z is within a range of 0<z<6; and δ is within a range of −0.3≦δ≦0.3.

First claim

What is claimed is:

1 . An active material comprising a composite oxide having a monoclinic crystal structure and represented by a general formula of Li w Na 4-x M1 y Ti 6-z M2 z O 14+δ , wherein
the M1 is at least one element selected from the group consisting of Rb, Cs, K and H, the M2 is at least one metallic element selected from the group consisting of Zr, Sn, V, Nb, Ta, Mo, W, Fe, Co, Mn and Al, and w is within a range of 0≦w<12, x is within a range of 0<x<4, y is within a range of 0≦y<2, z is within a range of 0<z<6, and δ is within a range of −0.3≦δ≦0.3.

2 . The active material according to claim 1 , wherein the metallic element M2 is at least one element selected from a group consisting of trivalent Fe, Co, Mn and Al, tetravalent Zr and Sn, pentavalent V, Nb and Ta, and hexavalent Mo and W.

3 . The active material according to claim 1 , wherein the crystal structure of the composite oxide has symmetry belonging to any one of space groups C2/m, C2, and Cm.

4 . The active material according to claim 1 , wherein a value of x is larger than a value of y.

5 . The active material according to claim 1 , wherein the metallic element M2 comprises Nb and/or Ta.

6 . The active material according to claim 1 , wherein the metallic element M2 comprises Nb.

7 . The active material according to claim 1 , wherein the composite oxide comprises a crystal water in an amount of 0.1 mol to 2 mol per 1 mol of the composite oxide.

8 . The active material according to claim 1 which is used for a battery.

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

10 . A battery pack comprising the nonaqueous electrolyte battery according to claim 9 .

11 . The battery pack according to claim 10 , further comprising:
an energizing external terminal; and a protective circuit.

12 . A battery pack comprising nonaqueous electrolyte batteries, each of the nonaqueous electrolyte batteries comprising:
a negative electrode comprising the active material according to claim 1 ; a positive electrode; and a nonaqueous electrolyte; wherein the nonaqueous electrolyte batteries are connected in series, in parallel or with a combination of series connection and parallel connection.

13 . A vehicle comprising the battery pack according to claim 10 .

14 . The vehicle according to claim 13 , wherein the battery pack is configured to recover a regenerative energy caused by a power of the vehicle.

Assignees

• Toshiba Kk

Inventors

• Harada Yasuhiro
• Takami Norio
• Yoshima Kazuomi

Classifications

• C01P2006/40

  Electric properties · CPC title

• C30B29/22

  Complex oxides · CPC title

• H01M2004/027

  Negative electrodes · 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

• C01G49/009

  Compounds containing iron, with or without oxygen or hydrogen, and containing two or more other elements · CPC title