JPH0628170B

PURPOSE:To prevent decrease in capacity and lengthen life by covering a conductive substrate to which electrically active polymer is bonded as a film with an electrically inactive resin film. CONSTITUTION:Polystyrene or polyethylene is used as a resin used for covering. When the surface of an electrode is covered with the resin by immersing it into a solution, the resin concentration in the solution is increased so that resin molecules are interwined each other in the solution. When it is covered by vapor deposition, the resin is placed in the bottom of a container, and the electrode is hung above the resin, and the container is heated under a reduced pressure. Adhesion of an electrically active polymer to a conductive substrate is increased, and decrease in capacity caused by repeated charge-discharge cycles is prevented and life is lengthened.