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
US2020243848A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2020243848-A1 |
| Application number | US-201816652283-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 30, 2018 |
| Priority date | Dec 1, 2017 |
| Publication date | Jul 30, 2020 |
| Grant date | — |
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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
Opening claim text (preview).
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. 2 . The negative electrode according to claim 1 , wherein the second negative electrode active material layer further comprises a second carbonaceous active material. 3 . 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. 4 . 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. 5 . 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. 6 . 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. 7 . 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. 8 . 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. 9 . A lithium secondary battery comprising the negative electrode as defined in claim 1 .
Assignees
Inventors
Classifications
- H01M4/133Primary
Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
Carbon or graphite · CPC title
Electrodes based on metals, Si or alloys · CPC title
Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx · CPC title
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- What does patent US2020243848A1 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
- What technology area does this patent fall under?
- Primary CPC classification H01M4/133. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Jul 30 2020 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 5 related publications on this page (citations in our corpus or others sharing the same primary CPC).