BATTERY

摘要

A battery comprising a positive electrode (10), a negative electrode (20) and a separator (31) provided interposed between the positive electrode (10) and the negative electrode (20), characterized in that at least one surface of said separator (31) is bonded to said positive electrode (10) or negative electrode (20) via a porous resin layer (41, 33) containing a solid filler. This battery can provide a battery which exhibits a high energy density and an excellent cycle life performance even if the electricity-storing element is received in a flexible material case.