US 11,749,794 B2
Electrolytic copper foil for secondary battery and method for producing the same
Sun Hyoung Lee, Iksan (KR); Tae Jin Jo, Iksan (KR); Seul-Ki Park, Iksan (KR); and Ki Deok Song, Iksan (KR)
Assigned to ILJIN MATERIALS CO., LTD., Iksan (KR)
Filed by ILJIN MATERIALS CO., LTD., Iksan (KR)
Filed on May 2, 2021, as Appl. No. 17/246,657.
Application 17/246,657 is a division of application No. 16/343,527, granted, now 11,171,319, previously published as PCT/KR2017/003361, filed on Mar. 28, 2017.
Claims priority of application No. 10-2016-0150358 (KR), filed on Nov. 11, 2016.
Prior Publication US 2021/0257603 A1, Aug. 19, 2021
This patent is subject to a terminal disclaimer.
Int. Cl. H01M 4/134 (2010.01); H01M 4/1395 (2010.01); C22C 9/00 (2006.01); C25D 3/38 (2006.01); C25D 1/04 (2006.01); H01M 4/04 (2006.01); H01M 10/02 (2006.01); H01M 4/66 (2006.01); C25D 17/12 (2006.01)
CPC H01M 4/0407 (2013.01) [C22C 9/00 (2013.01); C25D 1/04 (2013.01); C25D 3/38 (2013.01); C25D 17/12 (2013.01); H01M 4/0404 (2013.01); H01M 4/66 (2013.01); H01M 4/661 (2013.01); H01M 10/02 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method of producing an electrolytic copper foil for a secondary battery, the method comprising:
preparing a plating solution containing copper, Total Organic Carbon (TOC), cobalt, and iron; and
applying a current density of 30 Ampere per Square Deci-metre (ASD) to 150 ASD under a temperature condition of 30° C. to 70° C. and performing electroplating by using a drum,
wherein a ratio of the TOC to the cobalt and the iron contained in the electrolytic copper foil follows Formula 1 below:
TOC/(cobalt+iron)=1.3 to 1.5  [Formula 1].