Lithium ion rechargeable battery
US-2016226064-A1 · Aug 4, 2016 · US
Positive electrode and secondary battery including the same
US10622625B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10622625-B2 |
| Application number | US-201715751343-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jul 4, 2017 |
| Priority date | Jul 4, 2016 |
| Publication date | Apr 14, 2020 |
| Grant date | Apr 14, 2020 |
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- Title
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Abstract
Official abstract text for this publication.
The present invention relates to a positive electrode and a secondary battery including the same, and particularly, to a positive electrode which includes a current collector; a first active material layer including first active material particles and disposed on the current collector; and a first pattern and a second pattern alternately disposed separately from each other on the first active material layer, wherein the first pattern includes first pattern active material particles, the second pattern includes second pattern active material particles, the first pattern has a thickness greater than that of the second pattern, and the second pattern has a volume expansion rate greater than that of the first pattern, and a secondary battery including the same.
First claim
Opening claim text (preview).
The invention claimed is: 1. A positive electrode comprising: a current collector; a first active material layer including first active material particles and disposed on the current collector; and a first pattern and a second pattern alternately disposed separately from each other on the first active material layer, wherein: the first pattern includes first pattern active material particles; the second pattern includes second pattern active material particles; the first pattern has a thickness greater than that of the second pattern; and the second pattern has a volume expansion rate greater than that of the first pattern. 2. The positive electrode of claim 1 , wherein: the first active material particle and the first pattern active material particle are LiCoO 2 ; and the second pattern active material particle is any one of LiNi 1-x1-y1 Co x1 Mn y1 O 2 (0<x1<1 and 0<y1<1) and LiNi 1-x2-y2 Co x2 Al y2 O 2 (0<x2<1 and 0<y2<1). 3. The positive electrode of claim 1 , wherein: the first active material particle is any one of LiNi 1-x1-y1 Co x1 Mn y1 O 2 (0<x1<1 and 0<y1<1) and LiNi 1-x2-y2 Co x2 Al y2 O 2 (0<x2<1 and 0<y2<1); the first pattern active material particle and the second pattern active material particle are LiCoO 2 ; and the second pattern has a porosity lower than that of the first pattern. 4. The positive electrode of claim 3 , wherein a difference between the porosity of the first pattern and the porosity of the second pattern is 5 percentage points or more. 5. The positive electrode of claim 1 , wherein: the first active material particle is LiCoO 2 ; the first pattern active material particle is at least one of LiNi 1-x1-y1 Co x1 Mn y1 O 2 (0<x1<1 and 0<y1<1) and LiNi 1-x2-y2 Co x2 Al y2 O 2 (0<x2<1 and 0<y2<l); the second pattern active material particle is at least one of LiFePO 4 and LiMn 2 O 4 ; and the second pattern has a porosity lower than that of the first pattern. 6. The positive electrode of claim 5 , wherein a difference between the porosity of the first pattern and the porosity of the second pattern is 5 percentage points or more. 7. The positive electrode of claim 1 , wherein the first pattern has a thickness 1.1 to 2 times greater than that of the second pattern. 8. A secondary battery comprising: the positive electrode according to claim 1 ; a negative electrode; a separator interposed between the positive electrode and the negative electrode; and an electrolyte.
Assignees
Inventors
Classifications
Positive electrodes · CPC title
Physical characteristics, e.g. porosity, surface area · CPC title
Electrodes composed of, or comprising, active material · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
- H01M4/366Primary
as layered products · CPC title
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- What does patent US10622625B2 cover?
- The present invention relates to a positive electrode and a secondary battery including the same, and particularly, to a positive electrode which includes a current collector; a first active material layer including first active material particles and disposed on the current collector; and a first pattern and a second pattern alternately disposed separately from each other on the first active m…
- Who is the assignee on this patent?
- Lg Chemical Ltd
- What technology area does this patent fall under?
- Primary CPC classification H01M4/366. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Apr 14 2020 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).