Surface-treated copper foil
US-9647272-B1 · May 9, 2017 · US
Copper foil for current collector of lithium secondary battery and negative electrode including the same
US10665865B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10665865-B2 |
| Application number | US-201916403473-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 3, 2019 |
| Priority date | Oct 1, 2018 |
| Publication date | May 26, 2020 |
| Grant date | May 26, 2020 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
The present disclosure provides an electrodeposited copper foil having a puncture strength value and a tear strength value. A ratio of the puncture strength value to the tear strength value is from 14 to 64. The present disclosure also provides a lithium-ion secondary battery. The lithium-ion secondary battery is manufactured by using the electrodeposited copper foil and has excellent charge-discharge cycle life.
First claim
Opening claim text (preview).
What is claimed is: 1. A copper foil for a current collector of a lithium secondary battery, wherein the copper foil has a puncture strength value and a tear strength value, and a ratio of the puncture strength value to the tear strength value is from 14 to 64. 2. The copper foil of claim 1 , wherein the puncture strength value is from 300 to 1200 N/mm 1.17 . 3. The copper foil of claim 1 , wherein the tear strength value is less than 50 N/mm. 4. The copper foil of claim 1 , wherein the copper foil has a deposition surface, and a surface roughness (Rz) of the deposition surface is less than 2.0 μm. 5. The copper foil of claim 1 , wherein a mass per unit area of the copper foil is from 17.8 to 329.4 g/m 2 . 6. A negative electrode comprising an electrodeposited copper foil, wherein the electrodeposited copper foil has a puncture strength value and a tear strength value, and a ratio of the puncture strength value to the tear strength value is from 14 to 64. 7. A copper foil for a current collector of a lithium secondary battery, wherein the copper foil has a puncture strength value of 300 to 1200 N/mm 1.17 and a tear strength value less than 50 N/mm. 8. The copper foil of claim 7 , wherein the copper foil has a deposition surface, and a surface roughness (Rz) of the deposition surface is less than 2.0 μm. 9. The copper foil of claim 7 , wherein a mass per unit area of the copper foil is from 17.8 to 329.4 g/m 2 .
Assignees
Inventors
Classifications
- C22C9/00Primary
Alloys based on copper · CPC title
Wires; Strips; Foils · CPC title
Negative electrodes · CPC title
Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title
- H01M4/661Primary
Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence) · CPC title
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- What does patent US10665865B2 cover?
- The present disclosure provides an electrodeposited copper foil having a puncture strength value and a tear strength value. A ratio of the puncture strength value to the tear strength value is from 14 to 64. The present disclosure also provides a lithium-ion secondary battery. The lithium-ion secondary battery is manufactured by using the electrodeposited copper foil and has excellent charge-di…
- Who is the assignee on this patent?
- Chang Chun Petrochemical Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification C22C9/00. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue May 26 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).