Tin phosphide (Sn4P3) is a promising anode material for sodium-ion batteries because of its relatively large theoretical capacity,appropriate Na+ alloying potential,and good cyclic stability.Herein,the Sn4P3 embedded into a carbon matrix with good rate performance and long cycle life is reported.The Sn4P3-C composite exhibits excellent rate performance (540 mAh g-1 at 5 A g-1) and the highest rever-sible capacity (844 mAh g-1 at 0.5 A g-1) among Sn4P3-based anodes reported so far.Its reversible capac-ity is as high as 705 mAh g-1 even after 100 cycles at 0.5 A g-1.Besides,its initial Coulomb efficiency can reach 85.6％,with the average Coulomb efficiency exceeding 99.75％ from the 3rd to 100th cycles.Na2C6O6 is firstly used as a cathode when Sn4P3 acts as anode,and the Na-Sn4P3-C//Na2C6O6 full cell shows excel-lent electrochemical performance.These results demonstrate that the Sn4P3-C composite prepared in this work displays high-rate capability and superior cyclic performance,and thus is a potential anode for sodium ion batteries.