Congo　red　doped　poly　(3,4-ethylene　dioxythiophene)/graphene　oxide　(GO/CR-PEDOT)　composite　was　prepared　by　simple　chemical　oxidation　method,　where　Congo　red　doped　poly　(3,4-ethylene　dioxythiophene)　(CR-PEDOT)　evenly　and　stably　coated　on　the　surface　of　graphene　oxide　(GO)　under　the　guidance　and　connection　of　congo　red　(CR),　respectively.　Therefore,　GO　with　a　large　specific　surface　area　could　bring　into　full　play　its　function　as　a　supporting　skeleton　to　decrease　the　degree　of　volume　expansion　and　shrinkage　of　GO/CR-PEDOT　composite　in　charge/discharge　process　and　improve　its　specific　capacitance　and　cycle　stability.　The　results　showed　that　the　maximum　specific　capacitance　of　GO/CR-PEDOT　composite　was　up　to　227　F/g　when　the　feeding　mass　ratio　of　GO　to　3,4-ethylene　dioxythiophene　was　1:1,　which　was　110%　higher　than　that　of　poly　(3,4-ethylene　dioxythiophene)　(PEDOT),　and　the　capacitance　retention　was　92.3　%　after　10,000　cycles.　Furthermore,　a　model　of　asymmetric　supercapacitor　was　fabricated　by　using　GO/CR-PEDOT　composite　as　positive　material,　activated　carbon　as　negative　material　and　1　mol/L　Na2SO4　as　electrolyte,　which　exhibited　that　the　energy　density　was　as　high　as　14.4　Wh/kg　when　the　power　density　was　996　W/kg　and　still　achieved　9.11　Wh/kg　at　a　high　power　density　of　7999　W/kg.　(C)　2021　Elsevier　Ltd.　All　rights　reserved.