Abstract: A multi-layer electrode structure is provided comprised of a plurality of electrode layers composed of a binder and an electrode material and coated on a current-collecting member, each of the electrode layers including a macromolecular substance wherein a first electrode layer in contact with the current-collecting member and the second electrode layer in contact with the first electrode layer are formed of different constituents or have different proportions of the same constituent. A method of forming the multi-layer electrode structures as well as a battery and double-layer capacitor formed from the multi-layer electrode structures are also disclosed.

Abstract: A pressure method for an electrode without causing any breakage of a current collecting material. The electrode structure comprises the current collecting material and an electrode layer. The electrode layer has a smaller surface area than a surface area of the current collecting material. The work roll with the concave portion pressurizes the electrode layer coated on the current collecting material while the convex portion to the section of the current collecting material without the electrode layer coated thereon where said section of the current collecting material is the predetermined distance away from the electrode layer, thereby elongating the electrode layer and the current collecting material.

Abstract: A mixer and a method for mixing and press-sliding a mixture of an ion-conducting polymer or a raw material of the ion-conducting polymer with a powdered substance 11 are disclosed. Due to the effective press-sliding process of this invention, the powdered substance 11 is effectively coated with the ion-conducting polymer 12.