Method of producing electrode for capacitor

Abstract

The present invention provides a method of producing an electrode for electric double layer capacitor, which yields the electrode having excellent electrode characteristics with good production suitability, using a coating material exhibiting a good dispersion state. A method of producing an electrode for a capacitor, the method comprising the steps of: applying an undercoat layer coating material which comprises at least electrically conductive particles, a binder and a solvent onto the current collector to form the undercoat layer; and applying an electrode layer coating material which comprises at least a carbon material, a binder and a solvent onto the undercoat layer to form the electrode layer. In the preparation of the undercoat layer coating material and / or in the preparation of the electrode layer coating material, dispersing treatment is conducted with ceramic beads as a dispersing medium.

Description

technical field [0001] The present invention relates to a method for producing an electrode for an electric double layer capacitor. Background technique [0002] Electrochemical capacitors such as electric double layer capacitors are expected as backup power supplies for power supplies such as portable devices (small electronic devices), auxiliary power supplies for electric vehicles or hybrid vehicles, etc. Various studies of its performance. [0003] In particular, with recent reductions in size and weight of portable devices, there has been a demand for further reductions in size and weight of capacitors while maintaining sufficient performance required for devices requiring electric double layer capacitors. That is, it is required to increase the energy density per unit mass and the energy density per unit volume of the electric double layer capacitor. Therefore, there is a demand for downsizing and weight reduction of electrodes used in electric double layer capacitor...

AI Technical Summary

Problems solved by technology

Therefore, the electrode layer needs to have a thickness sufficient to maintain the mechanical strength of the sheet-like shape, and it is difficult to reduce the thickness of the electrode layer.