Patent ID: 8049105

Claim:
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 d 1 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); wherein the average pore size d 1 is defined by a formula d 1 =2r, where r is an average pore radius in μm determined by mercury porosimetry; wherein the porous film (A) is a material selected from the group consisting of polyolefins, polyesters, polyamides, polyimides, acetalized polyvinyl alcohol, vinyl chloride-vinyl acetate copolymers, and polyphenylene sulfide and wherein a sensitizing dye is carried on the surface of the electrically conducting material.