| abstract |
The present invention provides a lithium ion polymer battery comprising an electrode having excellent adhesion and electrical conductivity between a current collector and an active material layer, cycle capacity maintaining characteristics being improved, wherein a bonding layer, which bonds the current collector to the active material layer, is stable to an organic solvent in an electrolytic solution and is excellent in storage stability, and also, it is made possible to suppress the corrosion of the current collector by a strong acid such as hydrofluoric acid generated in the battery. The lithium ion polymer battery comprises a positive electrode comprising a positive electrode current collector, and a positive electrode active material layer, which contains a first binder 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 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 is a polymer compound obtained by modifying the first or second binder with a modifying material. |