Electrodeposited copper foil and electrode, and lithium-ion secondary battery comprising the same

Patent metadata

Field	Value
Publication number	US-11362337-B2
Application number	US-202017260405-A
Country	US
Kind code	B2
Filing date	Jan 15, 2020
Priority date	Feb 1, 2019
Publication date	Jun 14, 2022
Grant date	Jun 14, 2022

Abstract

Provided are an electrodeposited copper foil, an electrode comprising the same, and a lithium-ion secondary battery comprising the same. The electrodeposited copper foil has a drum side and a deposited side opposing the drum side, wherein at least one of the drum side and the deposited side exhibits a void volume value (Vv) in the range of 0.17 μm3/μm2 to 1.17 μm3/μm2; and an absolute value of a difference between a maximum height (Sz) of the drum side and a Sz of the deposited side is in the range of less than 0.60 μm.

First claim

What is claimed is:

1. An electrodeposited copper foil comprising a drum side and a deposited side opposing the drum side, wherein at least one of the drum side and the deposited side exhibits a void volume (Vv) in the range of 0.17 μm 3 /μm 2 to 1.17 μm 3 /μm 2 ; and an absolute value of a difference between a maximum height (Sz) of the drum side and a Sz of the deposited side is in the range of less than 0.60 μm; wherein a void volume is obtained according to Standard Method ISO 25178-2:2012; the Vv refers to a void volume at a material ratio of 10%; the Sz is obtained according to Standard Method ISO 25178-2:2012.

2. The electrodeposited copper foil of claim 1 , wherein the drum side exhibits a Vv in the range of 0.17 μm 3 /μm 2 to 1.17 μm 3 /μm 2 and the deposited side exhibits a Vv in the range of 0.17 μm 3 /μm 2 to 1.17 μm 3 /μm 2 .

3. The electrodeposited copper foil of claim 1 , wherein at least one of the drum side and the deposited side exhibits a core void volume (Vvc) in the range of 0.16 μm 3 /μm 2 to 1.07 μm 3 /μm 2 ; wherein the Vvc is a difference in void volume between a first material ratio of 10% and a second material ratio of 80%.

4. The electrodeposited copper foil of claim 1 , wherein the drum side exhibits a Vvc in the range of 0.16 μm 3 /μm 2 to 1.07 μm 3 /μm 2 and the deposited side exhibits a Vvc in the range of 0.16 μm 3 /μm 2 to 1.07 μm 3 /μm 2 ; wherein the Vvc is a difference in void volume between a first material ratio of 10% and a second material ratio of 80%.

5. The electrodeposited copper foil of claim 1 , wherein at least one of the drum side and the deposited side exhibits a dale void volume (Vvv) in the range of 0.01 μm 3 /μm 2 to 0.10 μm 3 /μm 2 ; wherein the Vvv refers to a void volume at a material ratio of 80%.

6. The electrodeposited copper foil of claim 1 , wherein the drum side exhibits a Vvv in the range of 0.01 μm 3 /μm 2 to 0.10 μm 3 /μm 2 and the deposited side exhibits a Vvv in the range of 0.01 μm 3 /μm 2 to 0.10 μm 3 /μm 2 ; wherein the Vvv refers to a void volume at a material ratio of 80%.

7. The electrodeposited copper foil of claim 4 , wherein the drum side exhibits a Vvv in the range of 0.01 μm 3 /μm 2 to 0.10 μm 3 /μm 2 and the deposited side exhibits a Vvv in the range of 0.01 μm 3 /μm 2 to 0.10 μm 3 /μm 2 ; wherein the Vvv refers to a void volume at a material ratio of 80%.

8. The electrodeposited copper foil of claim 1 , wherein at least one of the drum side and the deposited side exhibits a Sz in the range of 1.24 μm to 3.25 μm.

9. The electrodeposited copper foil of claim 1 , wherein the drum side exhibits a Sz in the range of 1.24 μm to 3.25 μm and the deposited side exhibits a Sz in the range of 1.24 μm to 3.25 μm.

10. The electrodeposited copper foil of claim 1 , wherein the electrodeposited copper foil has a thickness in the range of 2 μm to 25 μm.

11. The electrodeposited copper foil of claim 1 , wherein the electrodeposited copper foil exhibits a ratio of a fatigue life of the electrodeposited copper foil to a thickness of the electrodeposited copper foil in the range of more than 5 times/μm.

12. The electrodeposited copper foil of claim 11 , wherein the ratio of a fatigue life of the electrodeposited copper foil to a thickness of the electrodeposited copper foil is in the range of 8 times/μm to 40 times/μm.

13. The electrodeposited copper foil of claim 1 , wherein the electrodeposited copper foil comprises a bare copper foil and a surface-treated layer disposed on the bare copper foil; the drum side and the deposited side are respectively on both outermost surfaces of the electrodeposited copper foil, and an outermost surface of the surface-treated layer is the drum side or the deposited side.

14. The electrodeposited copper foil of claim 13 , wherein the surface-treated layer is at least one selected from the group consisting of: a zinc-chromium layer, a chromium layer, and an organic layer.

15. An electrode for a lithium-ion secondary battery comprising the electrodeposited copper foil of claim 1 , at least one binder and at least one active substance.

16. The electrode for a lithium-ion secondary battery of claim 15 , wherein the binder and the active substance are in contact with the deposited side of the electrodeposited copper foil.

17. The electrode for a lithium-ion secondary battery of claim 15 , wherein the binder and the active substance are in contact with the drum side of the electrodeposited copper foil.

18. A lithium-ion secondary battery comprising the electrode for a lithium-ion secondary battery of claim 15 .

Assignees

• Chang Chun Petrochemical Co Ltd

Inventors

• Huang Huei-Fang
• Wu Chih-Chung
• Lai Yao-Sheng
• Chou Jui-Chang

Classifications

• H05K1/09

  Use of materials for the {conductive, e.g. } metallic pattern · CPC title

• B32B15/08

  of synthetic resin · CPC title

• H05K3/384

  by plating · CPC title

• C25D5/10

  Electroplating with more than one layer of the same or of different metals (for bearings C25D7/10) · CPC title

• H01M4/70

  characterised by shape or form · CPC title