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

Patent metadata

Field	Value
Publication number	US-2021305580-A1
Application number	US-202017260405-A
Country	US
Kind code	A1
Filing date	Jan 15, 2020
Priority date	Feb 1, 2019
Publication date	Sep 30, 2021
Grant date	—

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.

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 .

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 .

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 .

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 .

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 .

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

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/661 Primary

  Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence) · CPC title

• H05K1/18

  structurally associated with non-printed electric components (H05K1/16 takes precedence) · CPC title

• C25D1/04 Primary

  Wires; Strips; Foils · CPC title

• B32B15/20

  comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)} · CPC title