TiO2　is　a　most　promising　anode　candidate　for　rechargeable　Na-ion　batteries　(NIBs)　because　of　its　appropriate　working　voltage,　low　cost,　and　superior　structural　stability　during　chage/discharge　process.　Nevertheless,　it　suffers　from　intrinsically　low　electrical　conductivity.　Herein,　we　report　an　in　situ　synthesis　of　Co2+-doped　TiO2　through　the　thermal　treatment　of　metal　organic　frameworks　precursors　of　MIL-125(Ti)-Co　as　a　superior　anode　material　for　NIBs.　The　Co2+-doped　TiO2　possesses　uniform　nanodisk　morphology,　a　large　surface　area　and　mesoporous　structure　with　narrow　pore　distribution.　The　reversible　capacity,　Coulombic　efficiency　(CE)　and　rate　capability　can　be　improved　by　Co2+　doping　in　mesoporous　TiO2　anode.　Co2+-doped　mesoporous　TiO2　nanodisks　exhibited　a　high　reversible　capacity　of　232　mAhg-1　at　0.1　Ag1-,　good　rate　capability　and　cycling　stability　with　a　stable　capacity　of　about　140　mAhg-1　at　0.5　Ag1-　after　500　cycles.　The　enhanced　Na-ion　storage　performance　could　be　due　to　the　increased　electrical　conductivity　revealed　by　Kelvin　probe　force　microscopy　measurements.　©　2017　American　Chemical　Society.