Aluminum alloy foil for electrode current collectors and manufacturing method thereof
First Claim
Patent Images
1. An electrode current collector formed by the steps of:
- applying an active material onto an aluminum alloy foil obtained by final cold rolling of an aluminum alloy obtained by subjecting an aluminum alloy ingot, comprising 0.1 to 1.0 mass % of Fe, 0.01 to 0.5 mass % of Si, and 0.01 to 0.2 mass % of Cu, with the rest consisting of Al and unavoidable impurities, each of the unavoidable impurities being contained by 0.02 mass % or less, and a total amount of the unavoidable impurities being 0.15 mass % or less, to a homogenizing treatment at 550°
C. to 620°
C. for 3 to 6 hours, followed by a hot rolling, with a starting temperature of 500°
C. to 550°
C. and an end-point temperature of 255°
C. to 300°
C., and a cold rolling, wherein the aluminum alloy foil after the final cold rolling has a tensile strength of 220 MPa or higher, a 0.2% yield strength of 180 MPa or higher, and an electrical conductivity of 58% IACS or higher; and
the aluminum alloy foil is capable of maintaining a tensile strength of 190 MPa or higher and a 0.2% yield strength of 160 MPa or higher even after the aluminum alloy foil is subjected to heat treatment at 120°
C. for 24 hours, at 140°
C. for 3 hours, or at 160°
C. for 15 minutes.
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Abstract
An aluminum alloy foil for an electrode current collectors has a high post-drying strength after application of an active material while keeping a high electrical conductivity. The aluminum alloy foil includes 0.1 to 1.0 mass % of Fe, 0.01 to 0.5% of Si, and 0.01 to 0.2 mass % of Cu, and the rest includes Al and unavoidable impurities. The aluminum alloy foil after final cold rolling has a tensile strength of 220 MPa or higher, a 0.2% yield strength of 180 MPa or higher, and an electrical conductivity of 58% IACS or higher. The aluminum alloy foil has a tensile strength of 190 MPa or higher and a 0.2% yield strength of 160 MPa or higher after the aluminum alloy foil is heat treated at any of 120° C. for 24 hours, 140° C. for 3 hours, and 160° C. for 15 minutes.
10 Citations
8 Claims
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1. An electrode current collector formed by the steps of:
applying an active material onto an aluminum alloy foil obtained by final cold rolling of an aluminum alloy obtained by subjecting an aluminum alloy ingot, comprising 0.1 to 1.0 mass % of Fe, 0.01 to 0.5 mass % of Si, and 0.01 to 0.2 mass % of Cu, with the rest consisting of Al and unavoidable impurities, each of the unavoidable impurities being contained by 0.02 mass % or less, and a total amount of the unavoidable impurities being 0.15 mass % or less, to a homogenizing treatment at 550°
C. to 620°
C. for 3 to 6 hours, followed by a hot rolling, with a starting temperature of 500°
C. to 550°
C. and an end-point temperature of 255°
C. to 300°
C., and a cold rolling, wherein the aluminum alloy foil after the final cold rolling has a tensile strength of 220 MPa or higher, a 0.2% yield strength of 180 MPa or higher, and an electrical conductivity of 58% IACS or higher; and
the aluminum alloy foil is capable of maintaining a tensile strength of 190 MPa or higher and a 0.2% yield strength of 160 MPa or higher even after the aluminum alloy foil is subjected to heat treatment at 120°
C. for 24 hours, at 140°
C. for 3 hours, or at 160°
C. for 15 minutes.- View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
Specification
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Current AssigneeUACJ Foil Corporation (Uacj Corp)
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Original AssigneeUACJ Foil Corporation (Uacj Corp), UACJ Corporation
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InventorsSeki, Masakazu, Suzuki, Satoshi, Furutani, Tomohiko, Yamamoto, Kenji, Ashizawa, Koichi
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Primary Examiner(s)D'Aniello, Nicholas P
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Application NumberUS13/995,916Publication NumberTime in Patent Office2,437 DaysField of Search429244, 429220, 429230, 429234, 429211, 148691US Class CurrentCPC Class CodesC22C 21/00 Alloys based on aluminiumC22F 1/04 of aluminium or alloys base...H01M 10/0525 Rocking-chair batteries, i....H01M 4/0471 involving thermal treatment...H01M 4/662 Alloys collectors of lead a...Y02E 60/10 Energy storage using batteries
