Ag　nanoparticles　decorated　N/S　dual-doped　graphene　nanohybrids　(Ag-NSRGO)　are　prepared　by　one-step　hydrothermal　method.　The　morphology,　structure　and　composition　of　the　samples　are　characterized　and　compared　with　graphene　(RGO),　Ag　nanoparticles　decorated　graphene　nanohybrids　(Ag-RGO)　and　Ag　nanoparticles　decorated　N-doped　graphene　nanohybrids　(Ag-NRGO).　The　effect　of　Ag　content　on　the　sample＇s　performance　is　also　studied.　For　the　sample　Ag-NSRGO,　Ag　nanoparticles　are　evenly　dispersed　in　N/S　dual-doped　graphene　(NSRGO)　to　form　a　three-dimensional　network　structure　and　there　is　a　pair　of　unique　redox　peaks　at　around　-0.9　V.　The　performance　of　Ag-NSRGO　is　much　better　than　that　of　RGO,　Ag-RGO,　and　Ag-NRGO.　When　the　Ag　content　is　35　wt%,　the　electrochemical　performance　of　the　sample　is　the　best.　The　optimal　sample　exhibits　a　specific　capacitance　as　high　as　1010.6　F　g(-1)　at　the　potential　window　from　-1.2　to　0　V.　In　addition,　an　asymmetric　supercapacitor　(ASC)　assembled　by　using　Ag-NSRGO35　and　NSRGO　as　the　negative　and　positive　electrodes　achieves　a　maximum　energy　density　of　40.69　W　h　kg(-1)　at　a　power　density　of　500　W　kg(-1)　and　the　excellent　cycling　stability　with　90.5%　of　the　capacitance　retained　after　10000　cycles.　(C)　2020　Elsevier　Ltd.　All　rights　reserved.