| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a wound electrode laminate effective for improving the life characteristics of a lithium ion secondary battery. <P>SOLUTION: In the electrode laminate of a lithium ion secondary battery where a strip positive electrode member bearing a positive electrode active material on the surface of a first strip metal foil, and a strip negative electrode member bearing a negative electrode active material on the surface of a second strip metal foil are wound while being superimposed together with a strip separator, a metal foil having a high tensile strength of 450-900 MPa is applied to at least one of the first and second strip metal foils. A stainless steel foil and a copper clad steel foil are applicable as the high strength strip metal foil. <P>COPYRIGHT: (C)2013,JPO&INPIT |
