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US 10,480,090 B2Granted
Electrolytic copper foil, current collector comprising the same, electrode comprising the same, secondary battery comprising the same, and method for manufacturing the same
AssigneeKcf Technologies, Inc.
InventorsDae Young Kim, Seung Min Kim
Life of this patent
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Abstract
An electrolytic copper foil, a current collector including the same, an electrode including the same, a secondary battery including the same and a method for manufacturing the same which can secure secondary batteries with high capacity maintenance. The electrolytic copper foil includes a first surface and a second surface opposite to the first surface, wherein each of the first and second surfaces has a peak count roughness Rpc of 10 to 100.
Claims11
An electrolytic copper foil for a secondary battery, the electrolytic copper foil comprising:
- a first surface;
- and
- a second surface opposite to the first surface,
- wherein each of the first and second surfaces has a peak count roughness Rpc of 10 to 100,
- wherein the peak count roughness Rpc of each of the first and second surfaces is an average of peak count roughness Rpc values measured at randomly-selected three points,
- the peak count roughness Rpc of each point is the number of effective peaks which rise above an upper criteria line of 0.5 μm per unit sampling length of 4 mm in a surface roughness profile obtained according to steel-iron test schedule (SEP 1940), and
- there is at least one valley deeper than a lower criteria line of −0.5 μm between adjacent ones of the effective peaks.
4 more elements
Dependencies are inferred from the claim text.