METHOD FOR PRODUCING AN ELECTRODEPOSITED COPPER FOIL FOR LITHIUM SECONDARY BATTERY
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United States of America
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Nov 28, 2024
app pub date -
Dec 19, 2022
filing date -
Dec 19, 2022
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Abstract
The invention relates to an electrodeposited copper foil and its manufacturing method. The copper foil has an as produced tensile strength above 52 kgf/mm2, presents tensile strength above 50 kgf/mm2 after 120 days at 35° C. and presents a recrystallization property under thermal stress. The copper foil is manufactured using an electrolyte comprising: copper at a concentration of at least 60 g/L; sulfuric acid at a concentration of at least 60 g/L; a halogen ion at a concentration of less than 2 mg/L; a thiourea-family electrolytic additive at a concentration between 0.001 mg/L and 0.1 mg/L; and a TOC in the electrolyte of less than 10 mg/L.
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