Transition　metal　phosphides　have　attracted　increasing　attention　as　anode　materials　for　sodium-ion　batteries　(SIBs).　Cobalt　phosphide　(CoP)　has　been　deemed　as　prospective　anode　materials　owing　to　its　high　theoretical　capacity.　Nevertheless,　the　defects　of　cobalt　phosphides　are　evident.　Low　conductivity,　the　non-negligible　volume　expansion　and　aggregation　of　particles　during　sodiation/desodiation　process　result　in　poor　cycling　performance　and　rapid　capacity　decay,　which　greatly　limit　their　applications.　Herein,　we　designed　a　hollow-nanotube　structure　of　sulfur-doped　cobalt　phosphide　(S-CoP)　nanoparticles　coated　by　nitrogen-doped　porous　carbon　(S-CoP@NPC),　which　can　be　successfully　synthesized　via　an　ordinary　hydrothermal　process　followed　by　the　low-temperature　phosphorization/sulfuration　treatment.　The　doping　of　sulfur　element　provides　more　active　sites,　meanwhile,　the　carbon　coating　largely　helps　to　avoid　the　agglomeration　of　nanoparticles,　alleviate　volume　expansion　and　improve　the　conductivity　of　materials.　The　S-CoP@NPC　composite　presents　stable　cycling　performance,　showing　a　discharge　specific　capacity　of　230　mAh　g(-1)　over　370　cycles　at　0.2　A　g(-1).　In　addition,　it　also　exhibits　good　rate　capability　with　a　discharge　specific　capacity　of　143　mAh　g(-1)　at　5　A　g(-1),　even　when　the　current　density　returns　to　0.2　A　g(-1),　the　discharge　specific　capacity　can　recover　213　mAh　g(-1).　Furthermore,　the　kinetic　analysis　of　SCoP@NPC　composite　explains　that　the　excellent　cycling　and　rate　performance　benefit　from　the　extrinsic　pseudocapacitive　behavior.　(C)　2020　Elsevier　Inc.　All　rights　reserved.