Patent ID: 6811928
Filing Date: 2004-11-02
Classification: H01M,Y02E,Y02P,Y10T

Abstract:
A battery comprising a battery body including:a positive electrode and a negative electrode each containing an active material, where the positive electrode and the negative electrode each has an uneven surface defining a space; an electrolytic solution containing an electrolyte; and an adhesive resin layer which is interposed in between the positive electrode and the negative electrode and is joined directly to both the positive electrode and the negative electrode, wherein the adhesive resin layer consists of one layer and contains an adhesive resin and a filler, where the adhesive resin comprises a polymer selected from the group consisting of polyvinylidene fluoride homopolymer and polyvinyl alcohol; the adhesive resin layer fills the space defined by the uneven surface of the positive electrode and the space defined by the uneven surface of the negative electrode; a weight ratio of the adhesive resin to the filler is not less than &frac15; and not more than 2; an average particle size of the filler is equal to or smaller than a particle size of the active material constituting each electrode: and the adhesive resin layer is connected to the positive electrode and the negative electrode at a predetermined peel strength in a range of from 50 gf/cm to 85 gf/cm.