Lithium secondary battery
US-2015349327-A1 · Dec 3, 2015 · US
Positive electrode active material and secondary battery comprising the same
US10930922B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10930922-B2 |
| Application number | US-201615264829-A |
| Country | US |
| Kind code | B2 |
| Filing date | Sep 14, 2016 |
| Priority date | Jan 5, 2011 |
| Publication date | Feb 23, 2021 |
| Grant date | Feb 23, 2021 |
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Abstract
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In the positive electrode active material according to the inventive concept, A positive active material for lithium secondary battery comprises a particle comprising M1, M2, and Li, wherein the particle comprises a center, a surface, and an intermediate portion between the center and the surface, wherein M1 and M2 are selected from transition metal and are different each other, and wherein concentrations of M1 and M2 have continuous concentration gradients from the center to the intermediate portion.
First claim
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We claim: 1. A positive active material for lithium secondary battery comprising a particle comprising M1, M2, M3 and Li, wherein the particle comprises a center, a surface, and an intermediate portion between the center and the surface, wherein M1, M2, and M3 are selected from transition metal and are different each other, wherein concentrations of M1, M2, and M3 have continuous concentration gradients from the center to the intermediate portion, wherein the concentrations of M1, M2, and M3 have continuous concentration gradient in an entire region of the particle, wherein the concentration of M1 decreases in the entire region of the particle, from the center to the surface, and wherein the concentrations of M2 and M3 increase in the entire region of the particle, from the center to the surface. 2. A positive active material for lithium secondary battery according to claim 1 , wherein the particle comprises a same concentration portion in which the concentration of M1 is equal to the concentration of M2, and wherein a distance between the center and the same concentration portion is smaller than a distance between the surface and the same concentration portion. 3. A positive active material for lithium secondary battery according to claim 2 , wherein the center comprises the same concentration portion. 4. A positive active material for lithium secondary battery according to claim 1 , wherein M1 is Ni, and M2 is Co. 5. A positive active material for lithium secondary battery according to claim 4 , wherein the particle further comprises Al.
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Classifications
Compounds containing nickel, with or without oxygen or hydrogen, and containing two or more other elements · CPC title
Oxides; Hydroxides · CPC title
Micrometer sized, i.e. from 1-100 micrometer · CPC title
one phase coated with the other · CPC title
Compounds of nickel · CPC title
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- What does patent US10930922B2 cover?
- In the positive electrode active material according to the inventive concept, A positive active material for lithium secondary battery comprises a particle comprising M1, M2, and Li, wherein the particle comprises a center, a surface, and an intermediate portion between the center and the surface, wherein M1 and M2 are selected from transition metal and are different each other, and wherein con…
- Who is the assignee on this patent?
- Univ Hanyang Ind Univ Coop Found
- What technology area does this patent fall under?
- Primary CPC classification H01M4/364. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Feb 23 2021 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).