Spiral wound electrolytic-electrochemical mixed capacitor with conductive polymer as cathode material and preparation method thereof

The invention discloses a spiral wound electrolytic-electrochemical mixed capacitor with a conductive polymer as a cathode material and a preparation method thereof. The mixed capacitor comprises a cylindrical mandrel and electrolyte. The cylindrical mandrel comprises an anode sheet, a cathode sheet and electrolytic paper, wherein the anode sheet is an anode foil for an aluminum electrolytic capacitor and is provided with an anode guiding foil strip. The cathode sheet is obtained through loading a cathode paste on a cathode conductive substrate, wherein the conductive polymer for an electrochemical capacitor is used as a cathode active material in the cathode paste. The cathode sheet is provided with a cathode guiding foil strip. The anode sheet, the cathode sheet and the electrolytic paper are successively stacked in a sequence that the cathode sheet, the electrolytic paper and the anode sheet are arranged from bottom to top. The anode sheet is placed on the top and furthermore another piece of electrolytic paper is placed below the downmost cathode sheet, and afterwards coiling is performed for forming the cylindrical mandrel. The mixed capacitor has advantages of low cost, high voltage and large capacity.