Active material, electrode, secondary battery, battery pack, and vehicle

Patent metadata

Field	Value
Publication number	US-2019288283-A1
Application number	US-201816119014-A
Country	US
Kind code	A1
Filing date	Aug 31, 2018
Priority date	Mar 16, 2018
Publication date	Sep 19, 2019
Grant date	—

Abstract

According to one embodiment, an active material is provided. The active material includes a lithium niobium composite oxide represented by a general formula LixFe1−yM1yNb11−2M2zO29 (1) and having an orthorhombic crystal structure. In the general formula (1), 0≤x≤23, 0≤y≤1 and 0<z≤6 are satisfied. Each of M1 and M2 independently includes at least one element selected from a group consisting of Fe, Mg, Al, Cu, Mn, Co, Ni, Zn, Sn, Ti, Ta, V, and Mo.

First claim

What is claimed is:

1 . An active material comprising a lithium niobium composite oxide represented by a general formula Li x Fe 1−y M1 y Nb 11−z M2 z O 29 (1) and having an orthorhombic crystal structure,
wherein in the general formula (1), 0≤x≤23, 0≤y≤1 and 0<z≤6 are satisfied and each of M1 and M2 independently comprises at least one element selected from a group consisting of Fe, Mg, Al, Cu, Mn, Co, Ni, Zn, Sn, Ti, Ta, V, and Mo.

2 . The active material according to claim 1 , wherein in the general formula (1), 0<y≤1 is satisfied.

3 . The active material according to claim 1 , wherein in the general formula (1), 0<z≤3.0 is satisfied.

4 . The active material according to claim 1 , wherein the M2 comprises elements selected from the group consisting of Fe, Mg, Al, Cu, Mn, Co, Ni, Zn, Sn, Ti, Ta, V, and Mo, and the elements have mutually different valence numbers.

5 . The active material according to claim 1 , wherein the M1 comprises elements selected from the group consisting of Fe, Mg, Al, Cu, Mn, Co, Ni, Zn, Sn, Ti, Ta, V, and Mo, and the elements have mutually different valence numbers.

6 . The active material according to claim 1 , wherein at least one of the M1 and the M2 comprises at least one element selected from a group consisting of Ti, V, and Sn.

7 . The active material according to claim 1 , wherein the lithium niobium composite oxide has a crystal system of a space group represented by Amma.

8 . An electrode comprising the active material according to claim 1 .

9 . The electrode according to claim 8 , which comprises an active material-containing layer comprising the active material.

10 . A secondary battery comprising:
a positive electrode; a negative electrode; and an electrolyte, wherein the negative electrode is the electrode according to claim 8 .

11 . A battery pack comprising the secondary battery according to claim 10 .

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

13 . The battery pack according to claim 11 , comprising plural of the secondary battery, wherein the secondary batteries are electrically connected in series, in parallel, or in a combination of series connection and parallel connection.

14 . A vehicle comprising the battery pack according to claim 11 .

15 . The vehicle according to claim 14 , which comprises a mechanism configured to convert kinetic energy of the vehicle into regenerative energy.

Assignees

• Toshiba Kk

Inventors

• Harada Yasuhiro
• Takami Norio
• Ise Kazuki

Classifications

• H01M2004/021

  Physical characteristics, e.g. porosity, surface area · CPC title

• H01M4/525 Primary

  of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title

• H01M4/505

  of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M4/485

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