# US 12,183,920 B2 · Porous dielectric particle, electrode for lithium ion secondary battery, and lithium ion secondary battery

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- Number: US 12,183,920 B2
- Document ID: US12183920B2
- Status: Granted
- Kind: B2
- Application number: 17/194,307
- Filed: 2021-03-07
- Published: 2021-09-16
- Granted: 2024-12-31
- Earliest claimed: 2020-03-10
- Assignees: Honda Motor Co., Ltd.
- Applicants: Honda Motor Co., Ltd.
- Inventors: Kazuki Saimen; Takashi Nakagawa; Yuka Nagatochi; Takeshi Fujino
- Web page: https://patentgrep.com/patent/US12183920B2

## CPC

- H01M 4/485: of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence)
- H01M 4/62: Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
- H01M 4/13: Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- H01M 2004/027: {Negative electrodes}
- H01M 2004/028: {Positive electrodes}
- Y02E 60/10: Energy storage using batteries
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

## Abstract

To provide a porous dielectric particle capable of achieving a lithium ion secondary battery having a high volumetric energy density, a high output, and being scarcely deteriorated in the output property even after charge and discharge are repeated, an electrode for a lithium ion secondary battery including the porous dielectric particle, and a lithium ion secondary battery using the electrode for a lithium ion secondary battery. A porous dielectric oxide is used, and this is dispersed and disposed in gaps between active material particles of an electrode. Specifically, as a particle to be blended in an electrode of a lithium ion secondary battery including an electrolytic solution, porous dielectric particles in which at least a part of a surface of porous core particles is coated with dielectric oxide is used.

## Claims

### Claim 1

An electrode for a lithium ion secondary battery comprising:
a porous dielectric particle; and
an electrode active material,
wherein the porous dielectric particle is a particle to be blended in an electrode of a lithium ion secondary battery including an electrolytic solution,
wherein the porous dielectric particle comprises: a porous core particle; and a dielectric oxide that covers at least a part of a surface of the porous core particle,
wherein the dielectric oxide is Li1.3 Al0.3Ti1.7(PO4)3, and
wherein a blending amount of the porous dielectric particle is 0.1 parts by mass or more and 1.0 parts by mass or less with respect to 100 parts by mass of the electrode for a lithium ion secondary battery.

### Claim 2 (depends on 1)

The electrode for a lithium ion secondary battery according to claim 1, wherein the core particle has a specific surface area of 20 m2/g or more.

### Claim 3 (depends on 1)

The electrode for a lithium ion secondary battery according to claim 1, wherein a coated amount of the dielectric oxide is 1 to 30% by volume with respect to a volume of the core particle.

### Claim 4 (depends on 1)

The electrode for a lithium ion secondary battery according to claim 1, wherein the electrode is a positive electrode.

### Claim 5 (depends on 1)

The electrode for a lithium ion secondary battery according to claim 1, wherein the electrode is a negative electrode.

### Claim 6 (depends on 1)

A lithium ion secondary battery comprising:
a positive electrode for a lithium ion secondary battery having a positive electrode active material layer including a positive electrode active material;
a negative electrode for a lithium ion secondary battery having a negative electrode active material layer including a negative electrode active material;
a separator disposed between the positive electrode for a lithium ion secondary battery and the negative electrode for a lithium ion secondary battery; and
an electrolytic solution,
wherein the positive electrode for a lithium ion secondary battery and/or the negative electrode for a lithium ion secondary battery are each the electrode for a lithium ion secondary battery according to claim 1.