Construction of MoS2-nitrogen-deficient graphitic carbon nitride anode toward high performance Sodium-ions batteries

Abstract

Molybdenum disulfide (MoS2) has attracted extensive attention as anode materials for sodium-ion batteries (SIBs). However, the electrochemical properties suffers from poor cycling stability due to its poor electronic conductivity. Herein, ultrathin MoS2 nanosheets are controllably deposition on nitrogen-deficient graphitic carbon nitride (ND-g-C3N4) that is obtained by magnesiothermic denitriding technology. ND-g-C3N4 as support with nitrogen-doping carbon material shows superior electronic conductivity, which can efficiently enhance Na+ diffusion mobility and provide fast electronic transferring. Benefitting from the synergistic effect between the superior electronic conductivity of ND-g-C3N4 and ultrathin MoS2 nanosheets, the as-prepared MoS2-ND-C3N4 delivers a high initial reversible specific capacity of 610.66 mA h g−1 at 0.1 A g−1, superior rate performance and remarkable long-cycle stability with 365.8 mA h g−1 at 1 A g−1 after 500 loops for SIBs. Therefore, the proposed MoS2-ND-C3N4 can unambiguously promote MoS2-carbon based materials in energy-storage applications.