A　hierarchically　porous　nanocomposite　of　few-layer　MoSe2/nitrogen-doped　carbon　(MoSe2/NC)　has　been　synthesized　through　an　efficient　route　combining　a　sol-gel　method　and　annealing　techniques.　Furthermore,　a　lithium-ion-based　dual-ion　battery　configuration　using　the　MoSe2/NC　nanocomposite　as　the　anode　and　commercial　graphite　as　the　cathode　(MoSe2/NC-G　Li-DIB)　has　been　proposed　for　the　first　time　and　demonstrated　a　reversible　discharge　capacity　of　86　mA　h　g-1　at　2C　(1C　=　100　mA　g-1)　after　150　cycles　and　a　high　rate　capability　up　to　76　mA　h　g-1　even　at　20C　within　an　operating　voltage　region　as　high　as　2.0-5.0　V.　These　remarkable　electrochemical　properties　are　mainly　attributed　to　the　unique　composition　and　construction　of　the　MoSe2/NC　nanocomposite　in　which　the　hierarchically　porous　nitrogen-doped　carbon　matrix　not　only　helps　to　homogeneously　disperse　the　in　situ-formed　few-layer　MoSe2　nanosheets,　shortening　the　Li+　diffusion　pathway　and　exposing　more　active　sites　for　Li+　storage,　but　also　enhances　the　electrical　conductivity　and　alleviates　the　volume　changes　during　the　cycling　process.　©　2020　American　Chemical　Society.