PROCESS FOR PREPARING POROUS ELECTROLYTIC METAL FOIL

Title:

PROCESS FOR PREPARING POROUS ELECTROLYTIC METAL FOIL

Document Type and Number:

WIPO Patent Application WO/1998/009003

Kind Code:

A1

Abstract:

A process for preparing a porous electrolytic metal foil by electrodepositing a metal on a drum cathode by using a drum cathode and an anode to form a metal foil layer and separating the formed layer from the drum cathode, wherein a coating of an electrically insulating material is formed on the cathode surface exposed after the foil separation by subjecting the exposed surface to electrolytic oxidation, by spraying the exposed surface with a resin liquid, or by suspending a machine oil or the like in an electrolyte to deposit the machine oil onto the exposed surface. The metal foil thus obtained has a large number of interconnecting pores in the direction of thickness and, when used as a collector substrate of an electrode for a battery, can prevent the separation of a composite for a battery, thus contributing to an improvement in the cycle time of a battery.

Inventors:

KATO HITOSHI (JP)
ASHIZAWA KOICHI (JP)
AKUTSU TSUKASA (JP)

Application Number:

PCT/JP1996/002460

Publication Date:

March 05, 1998

Filing Date:

August 30, 1996

Export Citation:

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Assignee:

CIRCUIT FOIL JAPAN (JP)
KATO HITOSHI (JP)
ASHIZAWA KOICHI (JP)
AKUTSU TSUKASA (JP)

International Classes:

C25D1/04; C25D1/08; C25D1/10; H01M4/64; H01M4/80; H01M4/66; H01M10/05; (IPC1-7): C25D1/04; C25C5/02; C25D1/08

Foreign References:

JPS4979931A

1974-08-01

Other References: