Congo　red　doped　poly(3,4-ethylene　dioxythiophene)　with　loose　granular　morphology　and　some　clear　channels　was　synthesized　by　chemical　oxidative　polymerization　using　Congo　red　as　dopant　and　surfactant,　and　the　formation　mechanism　of　its　morphology　was　confirmed　by　means　of　fourier　transform　infrared　spectrum,　X-ray　diffraction,　UV-Vis　absorption　spectrum　and　scanning　electron　microscope.　The　influences　of　feeding　molar　ratio　of　Congo　red　to　ethylene　dioxythiophene　on　its　electrochemical　properties　were　discussed　by　cyclic　voltammetry,　galvanostatic　charge-discharge　and　electrochemical　impedance　spectroscopy.　The　results　showed　that　the　maximum　specific　capacitance　of　Congo　red　doped　poly(3,4-ethylene　dioxythiophene)　could　reach　206　F/g　when　the　feeding　molar　ratio　of　Congo　red　to　ethylene　dioxythiophene　was　0.08:1,　which　was　58%　higher　than　that　of　poly(3,4-ethylene　dioxythiophene).　The　improved　specific　capacitance　of　Congo　red　doped　poly(3,4-ethylene　dioxythiophene)　could　be　due　to　its　special　molecular　structure　and　loose　granular　morphology　with　some　clear　channels.　(C)　2018　Elsevier　Ltd.　All　rights　reserved.