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US 2014/0193660 A1Published application
Electrolytic copper foil and method for producing the same
AssigneeChang Chun Petrochemical Co., Ltd.
InventorsChen-Ping Tsai, Kuei-Sen Cheng, Chyen-Fu Lin
Life of this patent
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Abstract
An electrolytic copper foil is provided. The electrolytic copper foil has a shiny side and a matte side opposing to the shiny side, wherein the difference in roughness between the shiny side and the matte side is 0.5 μm or less. The electrolytic copper foil has a tensile strength of 45 kg/mm2 or above, and is particularly suitable for applications in a lithium ion secondary battery.
Claims11
An electrolytic copper foil, comprising:
- a shiny side;
- and
- a matte side opposing to the shiny side,
- wherein the shiny side and the matte side have a difference in roughness of 0.5 μm or less, and the electrolytic copper foil has a tensile strength of 45 kg/mm2 or above.
1 more element
A method for producing an electrolytic copper foil, comprising steps of:
- adding a hydrogen peroxide solution in a copper sulfate electrolyte;
- and
- performing an electrochemical reaction on the copper sulfate electrolyte added with the hydrogen peroxide solution, so as to obtain the electrolytic copper foil.
Dependencies are inferred from the claim text.