Electrode for power storage device and method for producing same
US-2020365899-A1 · Nov 19, 2020 · US
Negative electrode and secondary battery including the same
US12002949B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-12002949-B2 |
| Application number | US-201816652283-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 30, 2018 |
| Priority date | Dec 1, 2017 |
| Publication date | Jun 4, 2024 |
| Grant date | Jun 4, 2024 |
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Abstract
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A negative electrode including: a current collector; a first negative electrode active material layer positioned on at least one surface of the current collector for a negative electrode and containing a first carbonaceous active material; and a second negative electrode active material layer positioned on a surface of the first negative electrode active material layer and containing a silicon-based active material and carbon nanotubes. A lithium secondary battery including the negative electrode is also disclosed.
First claim
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What is claimed is: 1. A negative electrode comprising: a current collector; a first negative electrode active material layer positioned on at least one surface of the current collector, wherein the first negative electrode active material layer comprises a first carbonaceous active material; and a second negative electrode active material layer positioned on a surface of the first negative electrode active material layer, wherein the second negative electrode active material layer comprises a silicon-based active material and carbon nanotubes, wherein the carbon nanotubes are positioned in a line contact mode and distributed homogeneously only on the surface of the silicon-based active material, and wherein the second negative electrode active material layer further comprises a second carbonaceous active material. 2. The negative electrode according to claim 1 , wherein the carbon nanotubes are present in an amount of 0.1 wt % to 2 wt % based on a total weight of the first and second negative electrode active material layers. 3. The negative electrode according to claim 1 , wherein the carbon nanotubes are present in an amount of 1 part to 20 parts by weight based on 100 parts by weight of the silicon-based active material. 4. The negative electrode according to claim 1 , wherein the carbon nanotubes have an average diameter of 10 nm to 120 nm and an average length of 0.5 μm to 20 μm. 5. The negative electrode according to claim 1 , wherein the carbon nanotubes have a specific surface area of 100 m 2 /g to 3,000 m 2 /g. 6. The negative electrode according to claim 1 , wherein the silicon-based active material is present in an amount of 1 wt % to 30 wt % based on a total weight of the first and second negative electrode active material layers. 7. The negative electrode according to claim 1 , wherein the first negative electrode active material layer and the second negative electrode active material layer have a thickness ratio of 90:10 to 10:90. 8. A lithium secondary battery comprising the negative electrode as defined in claim 1 . 9. The negative electrode according to claim 1 , wherein the silicon-based active material consists of SiO particles. 10. A negative electrode comprising: a current collector; a first negative electrode active material layer positioned on at least one surface of the current collector, wherein the first negative electrode active material layer comprises a first carbonaceous active material; and a second negative electrode active material layer positioned on a surface of the first negative electrode active material layer, wherein the second negative electrode active material layer comprises a silicon-based active material and carbon nanotubes, wherein the carbon nanotubes are positioned in a line contact mode and distributed homogeneously only on the surface of the silicon-based active material.
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- What does patent US12002949B2 cover?
- A negative electrode including: a current collector; a first negative electrode active material layer positioned on at least one surface of the current collector for a negative electrode and containing a first carbonaceous active material; and a second negative electrode active material layer positioned on a surface of the first negative electrode active material layer and containing a silicon-…
- Who is the assignee on this patent?
- Lg Chemical Ltd, Lg Energy Solution 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 Jun 04 2024 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).