Porous electrodes, devices including the porous electrodes, and methods for their production

Abstract

Disclosed is a porous electrode comprising a porous film (A) with through pores and an electrically conducting material selected from the group consisting of conductor and semiconductor, the porous film (A) having an average pore size d1 of from 0.02 to 3 μm and a porosity of from 40 to 90%, the electrically conducting material being filled in the through pores of the porous film (A). A dye-sensitized solar cell and an electric double layer capacitor including the porous electrode as a constituent are also disclosed.

1 . An electric double layer capacitor comprising:
 a first and second substrates opposing each other,   a counter electrode, a porous electrode and a collecting electrode which are arranged between the first and second substrates in this order as viewed from the first substrate, and   an electrolyte interposed between the counter electrode and the collecting electrode through the porous electrode;   wherein the porous electrode is an electrode comprising a porous film (A) with through pores and a conductor, the porous film (A) having an average pore size d1 of from 0.02 to 3 μm and a porosity of from 40 to 90%, the conductor being filled in the through pores of the porous film (A), and the conductor being isolated from the counter electrode.   
     
     
         2 . The electric double layer capacitor according to  claim 1 , further comprising a porous film (B) with through pores which is arranged between the porous electrode and the counter electrode and on the porous film (A), the porous film (B) having an average pore size smaller than the average pore size d1 of the porous film (A). 
     
     
         3 . The electric double layer capacitor according to  claim 2 , wherein substantially no electrically conducting material is filled in the through pores of the porous film (B). 
     
     
         4 . The electric double layer capacitor according to  claim 1 , wherein the conductor is a carbonaceous powder.