Covalent functionalization of electrochemically exfoliated 1T-MoS2 nanosheets for high-performance supercapacitor electrode.

Covalently functionalized 1T-MoS 2 (Fc-1T-MoS 2) nanosheets are synthesized by the chemical reaction between electrochemically exfoliated 1T-MoS 2 nanosheets and iodobenzene. The NH 2 Ph ring functionality and 1T-MoS 2 phase improves the electrochemical performance for supercapacitors by enhancing the charge density and electronic properties, which leads to fast charge transport and high charge storage capacity. The Fc-1T-MoS 2 has a high specific capacitance of 501 F g−1 at a current density of 1 A g−1 with capacitance retention of 76.32% after 2000 cycles, which is 2.6 times of magnitude higher than that of bare 1T-MoS 2 nanosheets. This study exposes the effect of functionalization of MoS 2 nanosheets for supercapacitor applications. [Display omitted] • 1T-MoS 2 nanosheets was exfoliated electrochemically. • Exfoliated 1T-MoS 2 nanosheets was functionalized with NH 2 Ph ring containing electron donating group. • The functionalized 1T-MoS 2 nanosheets showed an excellent supercapacitance performance as compared to bare 1T-MoS 2 nanosheets. [ABSTRACT FROM AUTHOR]