Electrolytic copper foil and electrode and copper-clad laminate comprising the same

Patent metadata

Field	Value
Publication number	US-10975487-B1
Application number	US-202016746054-A
Country	US
Kind code	B1
Filing date	Jan 17, 2020
Priority date	Dec 9, 2019
Publication date	Apr 13, 2021
Grant date	Apr 13, 2021

Abstract

Provided are an electrolytic copper foil, and an electrode and a copper-clad laminate comprising the same. The electrolytic copper foil comprises a base copper layer having a drum side and a deposited side; wherein the electrolytic copper foil has a Charpy impact strength from 0.4 J/mm2 to 5.8 J/mm2.

First claim

What is claimed is:

1. An electrolytic copper foil comprising a base copper layer; wherein a Charpy impact strength of the electrolytic copper foil ranges from 0.4 J/mm 2 to 5.8 J/mm 2 .

2. The electrolytic copper foil of claim 1 , wherein the Charpy impact strength of the electrolytic copper foil ranges from 0.5 J/mm 2 to 5.3 J/mm 2 .

3. The electrolytic copper foil of claim 1 , wherein the electrolytic copper foil has two opposite surfaces; wherein at least one of the two surfaces of the electrolytic copper foil has an aspect ratio of surface profile from 14 to 693; the aspect ratio of surface profile is a ratio of a mean width of the roughness profile elements (RSm) to a root mean square deviation of the roughness profile (Rq).

4. The electrolytic copper foil of claim 3 , wherein the aspect ratio of surface profile ranges from 37 to 506.

5. The electrolytic copper foil of claim 3 , wherein the RSm ranges from 9 μm to 523 μm.

6. The electrolytic copper foil of claim 3 , wherein the Rq ranges from 0.14 μm to 1.34 μm.

7. The electrolytic copper foil of claim 3 , wherein the Rq ranges from 0.16 μm to 1.25 μm.

8. The electrolytic copper foil of claim 1 , wherein the base copper layer has a drum side and a deposited side opposite the drum side, and the electrolytic copper foil further comprises at least one surface-treated layer formed on at least one of the drum side and the deposited side of the base copper layer.

9. The electrolytic copper foil of claim 8 , wherein the at least one surface-treated layer comprises an anti-corrosion layer.

10. The electrolytic copper foil of claim 8 , wherein the at least one surface-treated layer comprises a nodule treated layer.

11. The electrolytic copper foil of claim 10 , wherein the at least one surface-treated layer further comprises at least one sub-layer formed on the nodule treated layer; and the at least one sub-layer is selected from the group consisting of: a copper covering layer, a nickel layer, a zinc layer, a chromium layer, and a silane coupling layer.

12. The electrolytic copper foil of claim 8 , wherein the at least one surface-treated layer comprises a first surface-treated layer and a second surface-treated layer, which are respectively formed on the drum side and the deposited side of the base copper layer.

13. The electrolytic copper foil of claim 3 , wherein the base copper layer has a drum side and a deposited side opposite the drum side, and the electrolytic copper foil further comprises at least one surface-treated layer formed on at least one of the drum side and the deposited side of the base copper layer.

14. The electrolytic copper foil of claim 13 , wherein the at least one surface-treated layer comprises an anti-corrosion layer.

15. The electrolytic copper foil of claim 13 , wherein the at least one surface-treated layer comprises a nodule treated layer.

16. The electrolytic copper foil of claim 15 , wherein the at least one surface-treated layer further comprises at least one sub-layer formed on the nodule treated layer; and the at least one sub-layer is selected from the group consisting of: a copper covering layer, a nickel layer, a zinc layer, a chromium layer, and a silane coupling layer.

17. An electrode for a lithium ion battery comprising the electrolytic copper foil of claim 1 , at least one binder, and at least one active substance.

18. A copper-clad laminate comprising the electrolytic copper foil of claim 1 and a resin substrate.

Assignees

• Chang Chun Petrochemical Co Ltd

Inventors

• Huang Huei-Fang
• Lai Yao-Sheng
• Chou Jui-Chang

Classifications

• H01M4/667

  in the form of layers, e.g. coatings · CPC title

• C25D7/0614

  Strips or foils · CPC title

• C25D1/04 Primary

  Wires; Strips; Foils · CPC title

• C23F11/185

  Refractory metal-containing compounds · CPC title

• C23F11/149

  Heterocyclic compounds containing nitrogen as hetero atom · CPC title