The　use　of　electrode　materials　with　a　rationally　designed　architecture　is　imperative　for　the　progression　of　high-performance　supercapacitors　(SCs).　Herein,　a　facile　approach　for　synthesizing　high-performance　composite　electrodes　using　polyaniline　nanorod　modified　biomass-derived　N,　S　co-doped　activated　carbon　(NSAC-PANI).　This　material　effectively　combines　the　merits　of　highly　conductive　activated　carbon,　a　hierarchical　porous　structure,　a　high　specific　surface　area,　and　a　high　theoretical　capacitance　of　PANI.　Benefiting　from　high　conductivity,　fast　ion　transport,　and　shorter　ion　diffusion　path　within　the　NSAC-PANI-2　electrode,　it　exhibits　high　specific　capacitances　of　304　F　g−1　at　1　A　g−1　in　1　M　H2SO4.　Furthermore,　the　symmetric　SC　assembled　by　NSAC-PANI-2　shows　a　high　energy　density　of　23.6　Wh　kg−1　at　a　power　density　of　395　W　kg−1,　and　retains　90.2%　of　initial　capacitance　after　5,000　cycles.　The　low　cost,　simple　synthesis　route,　and　superior　electrochemical　performance　of　composite　electrodes　provide　further　insight　into　energy　storage　applications.　©　2023　Elsevier　B.V.