Construction of hierarchical MoSe2@C hollow nanospheres for efficient lithium/sodium ion storage

Abstract

MoSe₂ has been recognized as a promising anode material for lithium/sodium ion batteries due to its unique structure and material properties. Here, hierarchical MoSe₂@C hollow nanospheres (MoSe₂@C HNSs) assembled with ultrathin nanosheets are prepared via a facile solvothermal method. The MoSe₂@C HNS composite is fabricated by an anion-exchange reaction from Mo-glycerate solid spheres combining with the carbonization of glucose. When used as an anode material for LIBs, the MoSe₂@C HNS composite manifests a reversible capacity of 711 mA h g⁻¹ after 300 cycles under a current density of 500 mA g⁻¹. When evaluated as an anode material for SIBs, the MoSe₂@C HNS composite delivers a high capacity of 683 mA h g⁻¹ at 100 mA g⁻¹ and maintains a capacity of 458 mA h g⁻¹ after 200 cycles at 200 mA g⁻¹. The efficient lithium and sodium ion storage performance should be ascribed to the unique hierarchical hollow nanostructure and synchronously incorporated carbon material.