# US 11,309,533 B2 · Composite oxide, active material composite material, electrode, battery, battery pack, and vehicle

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 11,309,533 B2
- Document ID: US11309533B2
- Status: Granted
- Kind: B2
- Application number: 16/802,656
- Filed: 2020-02-27
- Published: 2021-03-18
- Granted: 2022-04-19
- Earliest claimed: 2019-09-13
- Assignees: Kabushiki Kaisha Toshiba
- Applicants: Kabushiki Kaisha Toshiba
- Inventors: Yasuhiro Harada; Norio Takami; Kazuomi Yoshima; Yasunobu Yamashita
- Web page: https://patentgrep.com/patent/US11309533B2

## CPC

- H01M 4/131: Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
- B60W 30/18127: {Regenerative braking}
- C01G 35/006: {Compounds containing tantalum, with or without oxygen or hydrogen, and containing two or more other elements}
- H01M 4/366: {as layered products}
- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 4/628: {Inhibitors, e.g. gassing inhibitors, corrosion inhibitors}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 10/0562: Solid materials
- H01M 50/20: Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders (structural combination of accumulators with charging apparatus H01M10/46)
- C01P 2002/52: containing elements as dopants
- C01P 2002/54: one element only
- C01P 2004/10: extending in one dimension, e.g. needle-like
- C01P 2004/20: extending in two dimensions, e.g. plate-like
- C01P 2004/32: Spheres
- C01P 2004/50: Agglomerated particles
- C01P 2004/51: Particles with a specific particle size distribution
- C01P 2004/62: Submicrometer sized, i.e. from 0.1-1 micrometer
- C01P 2004/64: Nanometer sized, i.e. from 1-100 nanometer
- H01M 2004/028: {Positive electrodes}
- H01M 2220/20: Batteries in motive systems, e.g. vehicle, ship, plane
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- B60W: CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
- C01G: COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F (metal hydrides {monoborane, diborane or addition complexes thereof} C01B6/00; salts of oxyacids of halogens C01B11/00; peroxides, salts or peroxyacids C01B15/00; thiosulfates, dithionites, polythionates C01B17/64; compounds containing selenium, or tellurium C01B19/00; binary compounds of nitrogen with metals C01B21/06; azides C01B21/08; {compounds containing nitrogen, other non-metals and metal C01B21/082}; metal amides C01B21/092; nitrites C01B21/50; {compounds of noble gases C01B23/0005}; phosphides C01B25/08; salts of oxyacids of phosphorus C01B25/16; carbides C01B32/90; compounds containing silicon C01B33/00; compounds containing boron C01B35/00; compounds having molecular sieve properties but not having base-exchange properties C01B37/00; compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites, C01B39/00; cyanides C01C3/08; salts of cyanamide C01C3/16; thiocyanates C01C3/20)
- C01P: INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

According to one embodiment, provided is a composite oxide containing lithium, niobium, and tantalum. A mass ratio of tantalum with respect to niobium is in a range of from 0.01% to 1.0%.

## Claims

### Claim 1

A composite oxide comprising lithium, niobium, and tantalum, a mass ratio of tantalum with respect to niobium being in a range of from 1×10−4 to 0.010.

### Claim 2 (depends on 1)

The composite oxide according to claim 1, wherein the composite oxide is represented by general formula Li1−xKxNb1−y−zTayFezO3, where subscript x is within a range of 0≤x≤2.4×10−2, and subscript y is within a range of 5.1×10−5≤y≤5.1×10−3, and subscript z is within a range of 0≤z≤8.2×10−3.

### Claim 3 (depends on 1)

The composite oxide according to claim 1, further comprising potassium, a mass ratio of the potassium with respect to the niobium being in a range of from 5×10−4 to 0.010.

### Claim 4 (depends on 1)

The composite oxide according to claim 1 further comprising iron, a mass ratio of the iron with respect to the niobium being in a range of from 1×10−4 to 5×10−3.

### Claim 5 (depends on 1)

An active material composite material comprising:
an active material particle; and
a composite oxide-containing layer in contact with at least part of a surface of the active material particle, the composite oxide-containing layer comprising the composite oxide according to claim 1.

### Claim 6 (depends on 1)

An electrode comprising:
an active material-containing layer comprising an active material; and
a composite oxide-containing layer in contact with at least a portion of the active material, the composite oxide-containing layer comprising the composite oxide according to claim 1.

### Claim 7 (depends on 6)

The electrode according to claim 6, wherein the active material has a particulate shape, and
the composite oxide-containing layer covers at least part of a particle surface of the active material.

### Claim 8 (depends on 6)

The electrode according to claim 6, wherein the composite oxide-containing layer is provided on at least one surface of the active material-containing layer.

### Claim 9 (depends on 6)

The electrode according to claim 6, wherein the active material-containing layer comprises at least one first sulfide solid electrolyte selected from the group consisting of Li2S—SiS2, LiI—Li2S—SiS2, LiI—Li2S—P2S5, LiI—Li2S—B2S3, Li3PO4—Li2S—Si2S, Li3PO4—Li2S—SiS2, Li3PO4—Li2S—SiS, LiI—Li2S—P2O5, LiI—Li3PO4—P2S5, Li2S—P2S5, Li2S—GeS2—P2S5, a glass-ceramic material represented by general formula Li4−wGe1−wPwS4 where subscript w is within a range of 0.7≤w≤1, and halides having part of a composition of each material substituted by a halogen.

### Claim 10 (depends on 1)

A battery comprising:
a positive electrode active material-containing layer comprising a positive electrode active material;
a negative electrode active material-containing layer comprising a negative electrode active material;
an electrically-insulating layer comprising a second sulfide solid electrolyte, the electrically-insulating layer being disposed between the positive electrode active material-containing layer and the negative electrode active material-containing layer; and
a composite oxide-containing layer in contact with at least part of the positive electrode active material, the composite oxide-containing layer comprising the composite oxide according to claim 1.

### Claim 11 (depends on 10)

The battery according to claim 10, wherein the positive electrode active material has a particulate shape, and the composite oxide-containing layer covers at least part of a particle surface of the positive electrode active material.

### Claim 12 (depends on 10)

The battery according to claim 10, wherein the composite oxide-containing layer is disposed between the positive electrode active material-containing layer and the electrically-insulating layer.

### Claim 13 (depends on 10)

A battery pack comprising the battery according to claim 10.

### Claim 14 (depends on 13)

The battery pack according to claim 13, further comprising:
an external power distribution terminal; and
a protective circuit.

### Claim 15 (depends on 13)

The battery pack according to claim 13, comprising plural of the battery, the batteries being electrically connected in series, in parallel, or in a combination of in-series and in-parallel.

### Claim 16 (depends on 13)

A vehicle comprising the battery pack according to claim 13.

### Claim 17 (depends on 16)

The vehicle according to claim 16, wherein the vehicle comprises a mechanism configured to convert kinetic energy of the vehicle into regenerative energy.