Title:
ROLLED COPPER FOIL FOR SECONDARY BATTERIES, SECONDARY BATTERY NEGATIVE ELECTRODE USING SAME, AND SECONDARY BATTERY
Document Type and Number:
WIPO Patent Application WO/2023/089963
Kind Code:
A1
Abstract:
The present invention provides a rolled copper foil for secondary batteries, the rolled copper foil having good heat resistance, thereby maintaining high strength even after a heat treatment. The present invention provides a rolled copper foil for secondary batteries, the rolled copper foil containing 0.05% by weight to 0.15% by weight of Zr and 0.05% by weight or less of oxygen, with the balance being made up of Cu and unavoidable impurities, while having a tensile strength in a direction parallel to the rolling direction of 500 MPa or more after a heat treatment at 350°C for 3 hours, and a change ratio of the tensile strength in the direction parallel to the rolling direction of 15% or less between before and after the heat treatment.
Inventors:
OKABE FUMIYA (JP)
Application Number:
PCT/JP2022/036556
Publication Date:
May 25, 2023
Filing Date:
September 29, 2022
Export Citation:
Assignee:
JX NIPPON MINING & METALS CORP (JP)
International Classes:
C22C9/00; C22F1/00; C22F1/08; H01M4/66
Domestic Patent References:
| WO2020179515A1 | 2020-09-10 | |||
| WO2015041348A1 | 2015-03-26 |
Foreign References:
| JP2014136821A | 2014-07-28 | |||
| JP2012243454A | 2012-12-10 | |||
| JP2016191139A | 2016-11-10 | |||
| JP2019077891A | 2019-05-23 |
Attorney, Agent or Firm:
AXIS PATENT INTERNATIONAL (JP)
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