We have first constructed a photo-rechargeable solar cell named photocapacitor. The three-electrode type photocapacitor comprises a dye-sensitized mesoporous TiO₂ electrode, two carbon-coated electrodes, and two liquid electrolytes. The three-electrode type photocapacitor is very easy to improve electro-generation and storage layers independently. One of the methods to improve the storage layer is modification of capacitance of the electric storage materials. Both active carbon and ruthenium oxide are well known to use as the material of electrochemical capacitors, which have different electric storage mechanisms. To combine use with both materials by introducing ruthenium oxide into active carbon, it is expected to improve the capacitance of electric storage material of photocapacitor. In this study, we try to use composite material as the electric storage material. The result showed that the capacitance was greatly improved, and these made output energy about 1.5 times larger.