An　original　electrode,　3D　TiO2@C　core/shell　nanobelt　arrays　with　controllable　carbon　coating　thickness,　was　successfully　constructed　in　this　work.　The　3D　TiO2　nanobelts　were　directly　grown　on　Ti　foil,　and　then　were　coated　with　a　layer　of　metal-organic　framework　(MOF).　After　thermal　annealing,　a　porous　carbon　layer　with　tunable　thickness　was　coated　onto　the　3D　TiO2　nanobelts　through　changing　the　MOF　thickness.　The　as-prepared　TiO2@C-2　h　with　5-nm-thick　carbon　layer　presented　an　excellent　discharge　capacity　of　210.5　mAh　g(-1)　after　100　cycles　at　a　current　density　of　50　mA　g(-1),　which　is　38%　higher　than　that　of　pure　TiO2　electrode　without　carbon　coating.　Moreover,　it　can　maintain　a　reversible　capacity　of　141　mAh　g(-1)　after　1000　cycles　at　a　current　density　of　200　mA　g(-1),　and　a　good　rate　performance　with　33%　of　capacity　retention　when　the　current　density　increasing　from　50　to　5000　mA　g(-1).　All　the　results　indicate　that　the　TiO2@C　core/shell　nanobelt　array　is　a　promising　anode　for　sodium-ion　batteries.　(C)　2018　Elsevier　B.V.　All　rights　reserved.