| abstract |
The purpose of the present invention is to provide: an electric double layer capacitor, a lithium ion secondary battery, and a lithium ion capacitor each having a high electrostatic capacity and excellent cycle characteristics; an electrode material suitable for providing the electric double layer capacitor, the lithium ion secondary battery and the lithium ion capacitor; and a composite material used in the electrode material. This composite is a composite of a conductive polymer having a nitrogen atom and a porous carbon material. The conductive polymer is bonded to a surface of the porous carbon material. A total pore volume of all pores having a diameter of 0.5 to 100.0 nm, measured by a BJH method, is 0.3 to 3.0 cm 3 / g, and a pore volume fraction of the pores having a diameter of 2, 0 nm or more and less than 20.0 nm measured by the BJH method is not less than 10% of the total pore volume. |