Electrolytic copper foil, processes for producing said electrolytic copper foil, and surface-treated copper foil obtained using said electrolytic copper foil

Electrolytic copper foil, processes for producing said electrolytic copper foil, and surface-treated copper foil obtained using said electrolytic copper foil

A purpose of the present invention is to provide an electrolytic copper foil which is superior in physical properties after high-temperature heating to conventional electrolytic copper foils and which is suitable also as the negative-electrode current collector of a lithium-ion secondary battery. Th...

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Hauptverfasser: TOMONAGA SAKIKO, MIYAKE KOICHI, HOZUMI KAZUTAKA, NAKAHARA HIROAKI, SHIBATA YASUHIRO
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APPARATUS THEREFOR
CHEMISTRY
ELECTROFORMING
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
METALLURGY
PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
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creator TOMONAGA SAKIKO
MIYAKE KOICHI
HOZUMI KAZUTAKA
NAKAHARA HIROAKI
SHIBATA YASUHIRO
description A purpose of the present invention is to provide an electrolytic copper foil which is superior in physical properties after high-temperature heating to conventional electrolytic copper foils and which is suitable also as the negative-electrode current collector of a lithium-ion secondary battery. The electrolytic copper foil is characterized by having an original-state tensile strength of 600 MPa or higher and a tensile strength after 350 DEG C*1 hour heating of 470 MPa or higher. Also provided is a process for producing the electrolytic copper foil, characterized by using an electrolytic copper solution acidified with sulfuric acid, the solution containing polyethyleneimine with a molecular weight of 10,000-70,000 in a concentration of 20-100 mg/L and having a chlorine concentration of 0.5-2.5 mg/L.
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subjects APPARATUS THEREFOR
CHEMISTRY
ELECTROFORMING
ELECTROLYTIC OR ELECTROPHORETIC PROCESSES
METALLURGY
PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTIONOF COATINGS
title Electrolytic copper foil, processes for producing said electrolytic copper foil, and surface-treated copper foil obtained using said electrolytic copper foil
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