Aluminum alloy foil for electrode collector and production method therefor

Patent metadata

Field	Value
Publication number	US-9847530-B2
Application number	US-201114235779-A
Country	US
Kind code	B2
Filing date	Jul 29, 2011
Priority date	Jul 29, 2011
Publication date	Dec 19, 2017
Grant date	Dec 19, 2017

Abstract

An object of the present invention is to provide an aluminum alloy foil for an electrode current collector, the foil having a high strength and high strength after a drying process. The aluminum alloy foil can be manufactured at low cost. Disclosed is an aluminum alloy foil for electrode current collector, including 0.03 to 1.0% of Fe, 0.01 to 0.2% of Si, 0.0001 to 0.2% of Cu, 0.005 to 0.03% of Ti, with the rest being Al and unavoidable impurities. The aluminum alloy foil has Fe solid solution content of 200 ppm or higher, and an intermetallic compound having a maximum diameter length of 0.1 to 1.0 μm in an number density of 2.0×10 4 particles/mm 2 or more.

First claim

The invention claimed is:

1. An aluminum alloy foil for electrode current collector, consisting of:
0.03 to 1.0 mass % (hereinafter referred to as %) of Fe, 0.01 to 0.2% of Si, 0.0001 to 0.2% of Cu, 0.005 to 0.03% of Ti, Al, and unavoidable impurities, wherein
an amount of each of the unavoidable impurities is 0.02% or less, and a total amount of the unavoidable impurities is 0.15% or less;
the aluminum alloy foil has Fe solid solution content of 200 ppm or higher, and an intermetallic compound having a maximum diameter length of 0.1 to 1.0 μm in a number density of 2.0×10 4 particles/mm 2 or more; and
the aluminum alloy foil has 0.2% yield strength of 170 MPa or more.

2. A method for manufacturing the aluminum alloy foil of claim 1 , comprising the steps of:
forming by continuous casting an aluminum alloy sheet consisting of 0.03 to 1.0% of Fe, 0.01 to 0.2% of Si, 0.0001 to 0.2% of Cu, 0.005 to 0.03% of Ti, Al, and unavoidable impurities, an amount of each of the unavoidable impurities being 0.02% or less, and a total amount of the unavoidable impurities being 0.15% or less; and
performing cold rolling followed by foil rolling without performing heat treatment to the aluminum alloy sheet to produce the aluminum alloy foil, wherein the aluminum alloy foil has Fe solid solution content of 200 ppm or higher, and an intermetallic compound having a maximum diameter length of 0.1 to 1.0 μm in a number density of 2.0×10 4 particles/mm 2 or more, and the aluminum alloy foil has 0.2% yield strength of 170 MPa or more.

Assignees

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

Inventors

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

Classifications

• C22C21/00

  Alloys based on aluminium · CPC title

• C22F1/04

  of aluminium or alloys based thereon · CPC title

• C22C1/026

  Alloys based on aluminium · CPC title

• B22D11/0622 Primary

  formed by two casting wheels · CPC title

• B22D25/04

  Casting metal electric battery plates or the like (manufacture thereof by multi-step processes H01M4/82) · CPC title