Patent ID: 7449031
Filing Date: 2008-11-11
Classification: H01G,Y02E

Abstract:
1. A method for producing a polarized electrode for an electric double layer capacitor having at least a pair of polarized electrodes, a separator and an electrolytic solution sealed in a container, the polarized electrode being formed with an electrode active material layer provided at least on one surface of a collector in a pattern form, wherein the pattern form is at least formed intermittently in a longitudinal direction of the collector, comprising at least steps of: a) providing the collector; b) providing an electrode active material composition; c) forming the electrode active material layer in a predetermined form by applying the electrode active material composition on the collector so that a coated section having the electrode active material composition coated on the collector and a non-coated section not having the electrode active material composition coated on the collector are provided in a predetermined period in a running direction of the collector by a die-coating method in which a die head supplies the electrode active material composition intermittently, and drying the electrode active material layer; d) pressing the collector on which the electrode active material layer is formed in the pattern form; and e) slitting the collector after pressing in a predetermined size; wherein the die-coating method according to the step of c′) is a method such that the electrode active material composition is supplied from an ink pan filled with the electrode active material composition to the die head via a switching valve by an ink supplying pump and at the time of non-application the switching valve is switched to return the electrode active material composition to the ink pan.