Preparation And Properties Of Anode Materials For MXene-nased Na-ion Battery

Lithium-ion batteries（LIBs）are limited in application due to resource,cost and safety issues.The development of sodium-ion batteries（SIBs）with abundant raw material resources and low cost has become a hot research topic recently.In this paper,a high-performance metal carbonitride（MXene）-based sodium-ion battery anode material with orientational"coral reef"-like three-dimensional structure was prepared through surface modification and composite structure design.（1）The MXene nanosheets with oxygen-rich and fluorine-depleted surfaces were successfully prepared by HCI/Li F wet chemical etching,and the surface of MXene was modified by heat treatment and dopamine（PDA）coating.performance impact.（2）The zeolite imidazole framework（ZIF-8）grown by the solution method was used as the precursor,and the stability of the structure was increased by anion and cation exchange and calcination,and the micro-nanostructured Zn S-Sb₂S₃/C heterojunction microrod was obtained.The heterojunction microrods exhibit excellent electrochemical performance,with a capacity of 533.9 m A h g^-1 and a capacity retention of 84%at a current density of 5.0 A g^-1 for 200 cycles.（3）Electrode materials with MXene-M-P@Zn S-Sb₂S₃/C"coral reef"-like biomimetic three-dimensional structure were obtained by electrostatic interaction and anion and cation exchange,and the fast ion and electron transfer channels and the space electric field at the hetero interface were further accelerated.The fast intercalation and deintercalation of Na⁺.The biomimetic electrode material exhibits excellent reaction kinetics and rate performance,and achieves a full-cell performance with an energy density of 194.3 Wh Kg^-1.