In　this　paper,　carbon-matrix-embedded　Mott–Schottky　(MS)　heterojunction　of　CoS2/NiS2　(CoS2/NiS2@C)　is　prepared.　The　obtained　CoS2/NiS2@C　offers　superior　sodium　storage　performance　such　as　large　specific　capacity　(861.0　mAh/g　at　2　A/g),　extraordinary　rate　capability　(649.2　mAh/g　at　10　A/g,　371.4　mAh/g　at　40　A/g)　and　excellent　cycling　stability　(380.5　mAh/g　after　3000　cycles　at　10　A/g,　and　298.5　mAh/g　after　2000　cycles　at　40　A/g).　Electrochemical　measurements　and　density　functional　theory　(DFT)　calculations　as　well　as　in/ex-situ　characterization　techniques　are　employed　to　reveal　the　underlying　mechanisms.　It　is　found　that　the　outperforming　sodium　storage　properties　of　CoS2/NiS2@C　can　be　mainly　attributed　to　the　C-S　bond　and　the　MS　heterojunction.　The　C-S　bond　formed　at　the　interface　between　CoS2/NiS2　and　the　carbon　matrix　promotes　the　migration　of　the　sodium　ions　in　the　carbon　matrix　to　the　embedded　CoS2/NiS2,　while　the　MS　heterojunction　accelerates　the　electrochemical　reaction　kinetics　of　CoS2/NiS2.　Moreover,　full-cell　is　assembled　with　CoS2/NiS2@C　and　Na3V2(PO4)3/C　to　validate　the　practical　application　of　CoS2/NiS2@C.　The　full-cell　achieves　both　high　specific　capacity　and　outstanding　rate　performance,　demonstrating　the　great　application　potential　of　such　CoS2/NiS2@C　anode　in　high-performance　sodium-ion　batteries.　©　2023　Elsevier　B.V.