| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide rolled copper foil which has not only high strength, high heat resistance, high conductivity and excellent workability but also high adhesion with a resin included in a negative electrode active material layer without executing roughening treatment by plating of electrodeposition grains or the like onto a copper foil surface, its manufacturing method, and a lithium ion secondary battery negative electrode using the rolled copper foil. <P>SOLUTION: The rolled copper foil includes Cr, preferably 0.20-0.40 wt.% Cr, and further contains elements (excluding Cr) having a function of improving strength and/or heat resistance, preferably one or more kinds of elements selected from the element group consisting of Ag, Sn, In, Ti and Zr, in such a ratio that, when the total sum of (atomic radius)×(atom%) of each constituting element is defined as the average atomic radius of the entire constituting elements, the average atomic radius is smaller than the atomic radius of Cu, and the balance comprises Cu and inevitable impurities. <P>COPYRIGHT: (C)2013,JPO&INPIT |
