Title:
圧延銅箔及びそれを用いた二次電池
Document Type and Number:
Japanese Patent JP5143923
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide rolled copper foil in which the generation of cracks and fractures caused by charging and discharging is prevented when being used for the negative electrode current collector of a secondary battery, and to provide a secondary battery using the rolled copper foil.SOLUTION: The rolled copper foil is composed of tough pitch copper standardized in JIS-C1100 or oxygen free copper standardized in JIS-C1020, and in the rolled copper foil, the fracture elongation in a direction parallel to a rolling direction (ELL) and the fracture elongation in a direction orthogonal to a rolling direction (ELT) satisfy the relational formula of ELL>1.2×ELT≥3%, and also, the tensile strength in a direction parallel to a rolling direction is 120 to 250 MPa.
Inventors:
Black saki Ikuya
Application Number:
JP2011070204A
Publication Date:
February 13, 2013
Filing Date:
March 28, 2011
Export Citation:
Assignee:
jx Nippon Mining & Metals Co., Ltd.
International Classes:
C22C9/00; C22C9/02; H01M4/66; C22F1/00; C22F1/08
Domestic Patent References:
| JP10230303A | ||||
| JP2000208149A | ||||
| JP2008248274A | ||||
| JP2009019232A | ||||
| JP2004256879A | ||||
| JP7065631A |
Attorney, Agent or Firm:
Kenichiro Akao
Akira Shimoda
Akira Shimoda