Positive electrode active material and preparation method thereof, positive electrode plate, secondary battery, battery module, battery pack, and electric apparatus
US-2024429384-A1 · Dec 26, 2024 · US
Positive electrode active material and lithium ion secondary battery
US2026100364A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2026100364-A1 |
| Application number | US-202519335501-A |
| Country | US |
| Kind code | A1 |
| Filing date | Sep 22, 2025 |
| Priority date | Oct 3, 2024 |
| Publication date | Apr 9, 2026 |
| Grant date | — |
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Abstract
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The positive electrode active material includes single crystal particles and polycrystalline particles, the polycrystalline particles are formed by associating a plurality of the single crystal particles, each of the single crystal particles and the polycrystalline particles includes a lithium nickel composite oxide having a layered structure, and the single crystal particles satisfy all relationships of the following formulas (1) to (3). In the formulas (1) to (3), D10, D50 and D90 each represent a particle diameter having an integrated value of 10%, a particle diameter having an integrated value of 50%, and a particle diameter having an integrated value of 90% in a volume-based particle size distribution of the single crystal particles, and D10, D50 and D90 each have units of micrometers. D 10 ≤ 2.5 ( 1 ) D 50 ≤ 5. ( 2 ) ( D 90 - D 1 0 ) / D 5 0 ≥ 3. ( 3 )
First claim
Opening claim text (preview).
What is claimed is: 1 . A positive electrode active material, wherein: the positive electrode active material contains single crystal particles and polycrystalline particles; the polycrystalline particles are formed by associating a plurality of the single crystal particles; each of the single crystal particles and the polycrystalline particles contains a lithium nickel composite oxide having a layered structure; and the single crystal particles satisfy all relationships of following formulas (1) to (3): D 10 ≤ 2.5 ( 1 ) D 50 ≤ 5. ( 2 ) ( D 90 - D 1 0 ) / D 5 0 ≥ 3. ( 3 ) in the formulas (1) to (3), D10, D50, and D90 each represent a particle diameter having an integrated value of 10%, a particle diameter having an integrated value of 50%, and a particle diameter having an integrated value of 90% in a volume-based particle size distribution of the single crystal particles, and D10, D50, and D90 each have units of micrometers. 2 . The positive electrode active material according to claim 1 , wherein the single crystal particles satisfy all relationships of following formulas (4) to (6): 0 . 1 ≤ D 10 ( 4 ) 1. ≤ D 50 ( 5 ) 12 ≥ ( D 9 0 - D 1 0 ) / D 5 0 . ( 6 ) 3 . The positive electrode active material according to claim 1 , wherein the single crystal particles satisfy a relationship of a following formula (7): 3. 0 ≤ D 9 0 / D 5 0 ≤ 1 2 . ( 7 ) 4 . The positive electrode active material according to claim 1 , wherein: the lithium nickel composite oxide has a composition represented by a general formula Li x Ni a Co b Mn c O y ; and relationships 0.1≤x≤1.5, 0.5≤a≤1.0, 0≤b≤0.3, 0≤c≤0.3, a+b+c=1.0, and 1.5≤y≤2.1 are satisfied. 5 . A lithium ion secondary battery comprising the positive electrode active material according to claim 1 .
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Classifications
Agglomerated particles · CPC title
Submicrometer sized, i.e. from 0.1-1 micrometer · CPC title
Electric properties · CPC title
Solid solutions · CPC title
Micrometer sized, i.e. from 1-100 micrometer · CPC title
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- What does patent US2026100364A1 cover?
- The positive electrode active material includes single crystal particles and polycrystalline particles, the polycrystalline particles are formed by associating a plurality of the single crystal particles, each of the single crystal particles and the polycrystalline particles includes a lithium nickel composite oxide having a layered structure, and the single crystal particles satisfy all relati…
- Who is the assignee on this patent?
- Toyota Jidosha Kk
- 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 Thu Apr 09 2026 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).