Electrode for an electric double layer capacitor and process for producing it

A process for producing an electrode for an electric double layer capacitor, which comprises preliminarily molding a mixture comprising a carbonaceous material, a polytetrafluoroethylene and a processing aid, then intermittently and sequentially supplying it to a cylinder mold for extrusion molding to continuously extrude it by paste extrusion to obtain an elongate extruded product, and rolling the obtained extruded product by rolling rolls to form it into a sheet shape.

An electrode for an electric double layer capacitor, which is a formed product of sheet shape prepared by forming a carbonaceous material by means of a polytetrafluoroethylene as a binder and which has a thickness of from 0.005 to 0.25 mm, a porosity of from 50 to 80% and the tensile strength in one direction is at least 1.5 kg/cm2.

An electric double layer capacitor, which comprises an electrode made of a formed product of sheet shape prepared by forming a carbonaceous material by means of a polytetrafluoroethylene as a binder and which has a thickness of from 0.005 to 0.25 mm, a porosity of from 50 to 80% and the tensile strength in one direction is at least 1.5 kg/cm2.

An electric double layer capacitor, which comprises an electrode which is prepared by preliminarily molding a mixture comprising a carbonaceous material, a polytetrafluoroethylene and a processing aid, then intermittently and sequentially supplying it to a cylinder mold for extrusion molding to continuously extrude it by pate extrusion to obtain an elongate extruded product, and rolling the obtained extruded product by rolling rolls to form it into a sheet shape.