Positive electrode material, electrochemical device containing same, and electronic device
US-11984579-B2 · May 14, 2024 · US
Positive electrode material, electrochemical device containing same, and electronic device
US12334536B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12334536-B2 |
| Application number | US-202418629202-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 8, 2024 |
| Priority date | Mar 5, 2020 |
| Publication date | Jun 17, 2025 |
| Grant date | Jun 17, 2025 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A positive electrode material includes secondary particles formed from primary particles. The positive electrode material satisfies the following relational expression: 15%≤(Dv50a−Dv50b)/Dv50b≤80%, where Dv50a represents Dv50 directly measured by a laser particle size analyzer for the positive electrode material without ultrasonic treatment, Dv50b represents Dv50 measured by the laser particle size analyzer for the positive electrode material after ultrasonic treatment, and Dv50 represents a particle size of the positive electrode material at a cumulative volume of 50% in a volume-based particle size distribution as measured by starting from small particle sizes. The secondary particles of the positive electrode material that meets the foregoing condition can form soft agglomerates, so that the electrochemical device is of high cycle performance and high safety performance.
First claim
Opening claim text (preview).
What is claimed is: 1. A positive electrode material, comprising: secondary particles, wherein the secondary particles comprise primary particles; and the positive electrode material satisfies the following relational expression: 15 % ≤ ( Dv 50 a - Dv 50 b ) / Dv 50 b ≤ 80 % ; wherein, Dv50a represents Dv50 directly measured by a laser particle size analyzer for the positive electrode material without ultrasonic treatment, Dv50b represents Dv50 measured by the laser particle size analyzer for the positive electrode material after ultrasonic treatment, and Dv50 represents a particle size of the positive electrode material at a cumulative volume of 50% in a volume-based particle size distribution as measured by starting from small particle sizes; the secondary particles further comprise a material layer, the material layer is disposed on at least a part of a surface of the secondary particles, and the material layer comprises at least one of elements B, P, Al, Zr, C, or S; wherein the positive electrode material has at least one of the following characteristics: 15 % ≤ ( Dv 10 a - Dv 10 b ) / Dv 10 b ≤ 80 % ; ( a ) 15 % ≤ ( Dv 90 a - Dv 90 b ) / Dv 90 b ≤ 80 % ; and ( b ) 10 % ≤ ( Dv 99 a - Dv 99 b ) / Dv 99 b ≤ 500 % ; ( c ) wherein, Dv10a represents Dv10 directly measured by the laser particle size analyzer for the positive electrode material without ultrasonic treatment, Dv10b represents Dv10 measured by the laser particle size analyzer for the positive electrode material after ultrasonic treatment, Dv90a represents Dv90 directly measured by the laser particle size analyzer for the positive electrode material without ultrasonic treatment, Dv90b represents Dv90 measured by the laser particle size analyzer for the positive electrode material after ultrasonic treatment, Dv99a represents Dv99 directly measured by the laser particle size analyzer for the positive electrode material without ultrasonic treatment, Dv99b represents Dv99 measured by the laser particle size analyzer for the positive electrode material after ultrasonic treatment, Dv10 represents a particle size of the positive electrode material at a cumulative volume of 10% in the volume-based particle size distribution as measured by starting f
Assignees
Inventors
Classifications
- H01M4/525Primary
of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy · CPC title
Physical characteristics, e.g. porosity, surface area · CPC title
Positive electrodes · CPC title
of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy · CPC title
Energy storage using batteries · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US12334536B2 cover?
- A positive electrode material includes secondary particles formed from primary particles. The positive electrode material satisfies the following relational expression: 15%≤(Dv50a−Dv50b)/Dv50b≤80%, where Dv50a represents Dv50 directly measured by a laser particle size analyzer for the positive electrode material without ultrasonic treatment, Dv50b represents Dv50 measured by the laser particle …
- Who is the assignee on this patent?
- Ningde Amperex Technology Ltd, Dongguan Amperex Tech Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/525. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Jun 17 2025 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).