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

Patent metadata

Field	Value
Publication number	US-2024313206-A1
Application number	US-202318485367-A
Country	US
Kind code	A1
Filing date	Oct 12, 2023
Priority date	Mar 17, 2023
Publication date	Sep 19, 2024
Grant date	—

Abstract

According to one embodiment, an active material is provided. The active material includes a Mo-containing niobium-titanium oxide having a monoclinic structure. A ratio I25/I24 of an intensity I25 of a second peak appearing within a range of 2θ from 25.0° to 25.5° relative to an intensity I24 of a first peak appearing within a range of 2θ from 23.5° to 24.5° is 0.5 or greater, according to X-ray diffraction spectroscopy for the active material.

First claim

What is claimed is:

1 . An active material comprising a Mo-containing niobium-titanium oxide having a monoclinic structure, a ratio I 25 /I 24 of an intensity I 25 of a second peak appearing within a range of 2θ from 25.0° to 25.5° to an intensity I 24 of a first peak appearing within a range of 2θ from 23.5° to 24.5° being 0.5 or greater, according to X-ray diffraction spectroscopy.

2 . The active material according to claim 1 , wherein the ratio I 25 /I 24 is 0.9 or less.

3 . The active material according to claim 1 , wherein the Mo-containing niobium-titanium oxide has a composition represented by a general formula Ti x−y Mo y Nb 12−x O 29+z , where 1.5≤x≤2.2, 0<y≤0.7x, and −3≤z≤1.

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

5 . The electrode according to claim 4 , further comprising an active material-containing layer, the active material-containing layer comprising the active material.

6 . A secondary battery comprising:
a positive electrode; a negative electrode; and an electrolyte, the negative electrode comprising the electrode according to claim 4 .

7 . A battery pack comprising the secondary battery according to claim 6 .

8 . The battery pack according to claim 7 , further comprising:
an external power distribution terminal; and a protective circuit.

9 . The battery pack according to claim 7 , comprising plural of the secondary battery, the secondary batteries being electrically connected in series, in parallel, or in combination of in-series connection and in-parallel connection.

10 . A vehicle comprising the battery pack according to claim 7 .

11 . The vehicle according to claim 10 , wherein the vehicle comprises a mechanism configured to convert kinetic energy of the vehicle into regenerative energy.

Assignees

• Toshiba Kk

Inventors

• Fukuda Yumi
• Ise Kazuki
• Hoshina Keigo

Classifications

• H02P3/14

  by regenerative braking · CPC title

• H01M2220/20

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

• H01M2004/027

  Negative electrodes · CPC title

• H01M10/425

  Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing (printed circuits H05K1/00) · CPC title

• B60L7/10

  Dynamic electric regenerative braking (B60L7/22 takes precedence) · CPC title