Patent ID: 7351498
Filing Date: 2008-04-01
Classification: H01M,Y02E

Abstract:
1. A lithium ion polymer secondary battery comprising: a positive electrode comprising a positive electrode current collector, and a positive electrode active material layer, which contains a first binder containing a polymer compound and a positive electrode active material, provided on the surface of the positive electrode current collector, a negative electrode comprising a negative electrode current collector, and a negative electrode active material layer which contains a second binder containing a polymer compound that is the same as or different from that of the first binder, and a negative electrode active material, provided on the surface of the negative electrode current collector, and an electrolyte, wherein a first bonding layer is interposed between the positive electrode current collector and the positive electrode active material layer, and a second bonding layer is interposed between the negative electrode current collector and the negative electrode active material layer, the first and second bonding layers contain both a third binder and a conductive material, and the third binder contains a polymer compound obtained by modifying either or both of the polymer compounds contained in the first and second binders or a polymer compound having any of repeating units of the polymer compounds, with modifying material.