Aluminum alloy foil for electrode current collectors and manufacturing method thereof

Patent metadata

Field	Value
Publication number	US-10367204-B2
Application number	US-201113995880-A
Country	US
Kind code	B2
Filing date	Dec 12, 2011
Priority date	Dec 20, 2010
Publication date	Jul 30, 2019
Grant date	Jul 30, 2019

Abstract

It is an object to provide an aluminum alloy foil for an electrode current collector, the foil having a high post-drying strength after application of an active material while keeping a high electrical conductivity. Disclosed is an aluminum alloy foil for an electrode current collector, comprising 0.03 to 0.1 mass % (hereinafter, “mass %” is simply referred to as “%”) of Fe, 0.01 to 0.1% of Si, and 0.0001 to 0.01% of Cu, with the rest consisting of Al and unavoidable impurities, wherein the aluminum alloy foil after final cold rolling has a tensile strength of 180 MPa or higher, a 0.2% yield strength of 160 MPa or higher, and an electrical conductivity of 60% IACS or higher; and the aluminum alloy foil has a tensile strength of 170 MPa or higher and a 0.2% yield strength of 150 MPa or higher even after the aluminum alloy foil is subjected to heat treatment at any of 120° C. for 24 hours, 140° C. for 3 hours, and 160° C. for 15 minutes.

First claim

The invention claimed is:

1. An aluminum alloy foil for an electrode current collector, comprising 0.03 to 0.1 mass % (hereinafter, “mass %” is simply referred to as “%”) of Fe, 0.01 to 0.1% of Si, and 0.0001 to 0.01% of Cu, with the rest being Al and unavoidable impurities, wherein the aluminum alloy foil after final cold rolling has a tensile strength of 180 MPa or higher, a 0.2% yield strength of 160 MPa or higher, and an electrical conductivity of 60% IACS or higher; and the aluminum alloy foil has a tensile strength of 170 MPa or higher and a 0.2% yield strength of 150 MPa or higher even after the aluminum alloy foil is subjected to heat treatment at any of 120° C. for 24 hours, 140° C. for 3 hours, and 160° C. for 15 minutes.

2. A method for manufacturing the aluminum alloy foil for an electrode current collector according to claim 1 , comprising: subjecting an aluminum alloy ingot to homogenizing treatment at 550 to 620° C. for 1 to 20 hours; and performing hot rolling at a starting temperature of 500° C. or higher and at an end-point temperature of 255 to 300° C.

Assignees

• Seki Masakazu
• Suzuki Satoshi
• Furutani Tomohiko
• Yamamoto Kenji
• Ashizawa Koichi
• Uacj Corp
• Uacj Foil Corp

Inventors

• Seki Masakazu
• Suzuki Satoshi
• Furutani Tomohiko
• Yamamoto Kenji
• Ashizawa Koichi

Classifications

• C22C21/02

  with silicon as the next major constituent · CPC title

• H01M4/662 Primary

  Alloys (collectors of lead alloys H01M4/685) · CPC title

• C22C21/00

  Alloys based on aluminium · CPC title

• C22F1/04

  of aluminium or alloys based thereon · CPC title

• H01M4/66 Primary

  Selection of materials · CPC title