Electrolytic copper foil for secondary battery, having enhanced physical properties at low temperature, and method for producing same

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United States of America Patent

PATENT NO 11866843
APP PUB NO 20210230760A1
SERIAL NO

17228766

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Abstract

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The present invention relates to an electrolytic copper foil for a secondary battery, having excellent physical properties at a low temperature, and a method for producing the electrolytic copper foil. The electrolytic copper foil for a secondary battery shows little change in the physical properties, such as tensile strength and elongation, of a copper foil even at a low temperature and thereby exhibits excellent cycle properties at the low temperature. The electrolytic copper foil for a secondary battery is produced from a plating solution, containing total organic carbon (TOC), cobalt, iron and zinc, by using a drum and coated with a cathode active material, wherein the ratio between the TOC, cobalt, iron and zinc contained in the electrolytic copper foil follows the following formula 1:

description='In-line Formulae' end='lead'TOC/(cobalt+iron+zinc)=1.0-1.2.  [Formula 1]description='In-line Formulae' end='tail'

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Patent Owner(s)

Patent OwnerAddress
LOTTE ENERGY MATERIALS CORPORATION63-25 SEOGAM-RO 3-GIL IKSAN-SI JEOLLABUK-DO

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Jo, Tae Jin Iksan, KR 18 44
Lee, Sun Hyoung Iksan, KR 29 155
Park, Seul-Ki Iksan, KR 17 16
Song, Ki Deok Iksan, KR 23 47

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