ROLLED COPPER FOIL FOR SECONDARY BATTERY NEGATIVE ELECTRODE POWER COLLECTION BODY, SECONDARY BATTERY NEGATIVE ELECTRODE AND SECONDARY BATTERY USING THE SAME, AND MANUFACTURING METHOD OF ROLLED COPPER FOIL FOR SECONDARY BATTERY NEGATIVE ELECTRODE POWER COLLECTION BODY

摘要

To provide a rolled copper foil for secondary battery negative electrode power collection body capable of successfully suppressing breakage of a copper foil by generation of stress due to volume change of an active material or the like.SOLUTION: There is provided a rolled copper foil for secondary battery negative electrode power collection body having tensile strength of 600 MPa or more and breaking elongation of 2.0% or more in a rolling parallel direction, and tensile strength of 640 MPa or more and breaking elongation of 3.5% or more in a rolling orthogonal direction.SELECTED DRAWING: Figure 1