Sodium-ion　hybrid　capacitors　(SIHCs)　have　shown　great　promise　in　achieving　both　high　energy　density　and　high　power　density　by　virtue　of　synergizing　the　merits　of　batteries　and　capacitors.　However,　the　lack　of　favorable　anode　material　with　superior　sodium-ion　storage　capability　is　still　a　major　challenge　in　the　development　of　high-performance　SIHCs.　Herein,　we　report　the　design　and　synthesis　of　a　promising　sodium-ion　storage　nanohybrid　with　FeS　quantum　dots　embedded　in　three-dimensional　(3D)　inverse　opal　(IO)-structured　N-doped　carbon　(3D-IO　FeS-QDs@NC).　By　virtue　of　the　robust　3D　conductive　architecture,　the　3D-IO　FeS-QDs@NC　nanohybrid　exhibits　favorable　features　of　excellent　electron/ion　transport　kinetics,　superior　structural　stability,　as　well　as　impressive　sodium-ion　storage　capability　with　high　specific　capacity,　outstanding　rate　capability,　and　ultra-long　cyclic　stability.　Such　highly　desirable　sodium　storage　performance　inspired　us　to　study　their　potential　application　in　SHICs　by　coupling　with　commercial　activated　carbon　(AC)　as　a　cathode.　The　as-developed　SHICs　can　deliver　a　maximum　energy　density　and　power　output　of　151.8　W　h　kg-1　and　9280　W　kg-1,　respectively,　and　an　excellent　cycling　lifespan　with　91%　capacity　retention　after　5000　cycles　at　1　A　g-1,　which　holds　promise　for　bridging　the　performance　gap　between　conventional　batteries　and　capacitors.　©　2019　The　Royal　Society　of　Chemistry.