▎ 摘　　要

Herein, we synthesized a multi-heteroatom doped ultrathin nanosheet Bi2Se3/N-doped graphene (NG) composite by using hexa(4-carboxyl-phenoxy)-cyclotriphosphazene (HCTP-COOH) containing Bi-MOF/NG as the precursor through a simple selenization step. Compared with pure Bi2Se3, Bi2Se3/NG with an ultrathin nanosheet structure displays significantly improved rate capacity and cycling performance while used as an anode for sodium-ion batteries. The enhanced electrochemical performance of the Bi2Se3/NG composite can be ascribed to the spe-cial nanosheet structures and multi-heteroatom doping in the carbon matrix.