Strongly coupled C@MoSe2@OMWCNT heterostructure as an anode for sodium ion batteries

Abstract

Abstract The advancement of high-performance sodium ion batteries (SIBs) necessitates the creation and production of sophisticated anode materials that can provide high capacity, exceptional rate capability, and prolonged cycle life. In this investigation, we have successfully synthesized C@MoSe2@OMWCNT (oxidized multiwall carbon nanotubes) materials utilizing OMWCNTs as a foundation. Theoretical analysis has revealed that the utilization of OMWCNTs not only enhances the structural stability of the anode materials but also improves the electrical conductivity and Na+ ion mobility (the Na+ diffusion barrier: (MoSe2) 0.91 eV vs (C@MoSe2@OMWCNT) 0.41 eV) of the C@MoSe2@OMWCNT. These properties make C@MoSe2@OMWCNT a promising candidate for the development of high-performance SIBs. When C@MoSe2@OMWCNT is employed as the anode for the SIB, it exhibits exceptional cycle stability, with a capacity of 303 mA h g-1 and 189 mA h g-1 after 500 and 3000 cycles, respectively, under a current density of 5 A g-1. Overall, this investigation provides valuable insights into the design and synthesis of advanced anode materials for SIBs, which could have significant implications for the development of next-generation energy storage devices.