COPPER FOIL FOR CURRENT COLLECTOR OF LITHIUM SECONDARY BATTERY
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United States of America Patent
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Issued Date -
Feb 16, 2012
app pub date -
Dec 7, 2010
filing date -
Aug 10, 2010
priority date (Note) -
Abandoned
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Abstract
A copper foil for a current collector of a lithium secondary battery is configured such that a nodule cluster having an inter-nodule aspect ratio of 0.001 to 2 is provided at a matte side formed on one surface of the copper foil, in aspect of a crystal structure, a ratio of a texture coefficient of a (200) surface to a sum of texture coefficients of a (111) surface and the (200) surface is 30 to 80%, the copper foil has a water contact angle of 90° or below, and impurity spots existing at the surface of the copper foil have a maximum diameter of 100 μm or less, and a minimal spacing distance between the impurity spots is 1 cm or more.
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