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US 2024/0194891 A1Published application
Copper foil with high strength and high elongation, electrode comprising the same, secondary battery comprising the same, and method for manufacturing the same
AssigneeSK Nexilis Co., Ltd.
InventorsShan Hua JIN, Min Seok YOON
Life of this patent
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Abstract
According to one embodiment of the present disclosure, there is provided a copper foil including a copper film including 99.9 wt % or more of copper, and a protective layer formed on the copper film, wherein the copper foil has a room temperature puncture strength in a range of 5.0 N to 7.0 N, and a high-temperature puncture strength in a range of 8.0 N to 12.5 N. At this time, the high-temperature puncture strength is a puncture strength measured after heat treatment at 190° C. for one hour.
Claims8
A copper foil comprising:
- a copper film including 99.9 wt % or more of copper;
- and
- a protective layer formed on the copper film,
- wherein the copper foil has a room temperature puncture strength in a range of 5.0 N to 7.0 N, and a high-temperature puncture strength in a range of 8.0 N to 12.5 N,
- wherein the high-temperature puncture strength is a puncture strength measured after heat treatment at 190° C. for one hour.
2 more elements
A method for manufacturing a copper foil, the method comprising:
- preparing an electrolyte containing copper ions;
- forming a copper film;
- and
- forming a protective layer on the copper film,
- wherein the forming of the copper film includes forming the copper film on a rotating anode drum by electrically connecting a cathode plate and the rotating anode drum, which are disposed to be spaced apart from each other in the electrolyte in an electrolytic bath, and
- the electrolyte includes:
- copper ions at a concentration of 70 g/L to 100 g/L;
- sulfuric acid at a concentration of 70 g/L to 150 g/L;
- chlorine (Cl) at a concentration of 1 ppm to 3 ppm;
- hydrogen peroxide at a concentration of 1 ml/L to 10 ml/L;
- silver ions (Ag+) at a concentration of 0.1 ppm to 1.0 ppm;
- cerium ions (Ce2+) at a concentration of 2 ppm to 10 ppm;
- and
- lead ions (Pb2+) at a concentration of 1 ppm to 20 ppm.
11 more elements
Dependencies are inferred from the claim text.