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

Patent metadata

Field	Value
Publication number	US-2024322148-A1
Application number	US-202318457494-A
Country	US
Kind code	A1
Filing date	Aug 29, 2023
Priority date	Mar 20, 2023
Publication date	Sep 26, 2024
Grant date	—

Abstract

According to one embodiment, provided is an active material including a composite metal oxide containing an Mo element, an Nb element, and at least one element M selected from the group consisting of Ti, V, Ta, Fe, Co, Mn, Ni, Bi, Sb, As, P, Cr, W, B, Na, K, Mg, Al, Ca, Y and Si. A crystal structure of the composite metal oxide has a non-periodic crystal structure. The active material includes the composite metal oxide as spherical particles. The spherical particles are secondary particles containing primary particles of the composite metal oxide having an average particle size from 10 nm to 300 nm, an average particle size of the secondary particles being from 1 μm to 10 μm.

First claim

What is claimed is:

1 . An active material comprising a composite metal oxide containing an Mo element, an Nb element, and an element M, M being at least one selected from the group consisting of Ti, V, Ta, Fe, Co, Mn, Ni, Bi, Sb, As, P, Cr, W, B, Na, K, Mg, Al, Ca, Y and Si, a crystal structure of the composite metal oxide having a non-periodic crystal structure, the active material comprising the composite metal oxide as spherical particles, the spherical particles being secondary particles containing primary particles of the composite metal oxide having an average particle size from 10 nm to 300 nm, an average particle size of the secondary particles being from 1 μm to 10 μm.

2 . The active material according to claim 1 , wherein an average value FU ave of coefficients of form unevenness of the spherical particles is 0.8 or more.

3 . The active material according to claim 1 , wherein a BET specific surface area of the spherical particles is from 5 g/m 2 to 40 g/m 2 .

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 positive electrode or 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

• Ise Kazuki
• Hoshina Keigo
• Harada Yasuhiro
• Takami Norio

Classifications

• H01M2220/20

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

• H01M2010/4271

  Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing · CPC title

• H01M2004/021

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

• Y02E60/10

  Energy storage using batteries · CPC title