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Polyaniline/titanium (PANI)/Ti composite electrodes were prepared by electrochemically depositing PANI on Ti foil with various electrochemical conditions.Results showed that the deposited PANI reveals a porous nanostructure with a high specific capacitance of 546 F/g.As the annealing temperature is higher than 110℃, the specific capacitance of PANI/Ti composite electrodes significantly decreased with increasing the annealing temperature caused by the thermal degradation of PANI.As for Electrochemical impedance spectroscopy (EIS) analysis, the simulated equivalent circuit mode suggested that the capacitive properties of PANI/Ti electrodes are markedly affected by the conductivity and doping level of PANI.