A free‐standing electrode based on 2D SnS 2 nanoplates@ 3D carbon foam for high performance supercapacitors

Summary A reasonable formation of an electrode material with three‐dimensional (3D) microstructure for supercapacitors was proposed. Two‐dimensional (2D) SnS 2 nanoplates were uniformly in situ grown on 3D carbon foam (CF) through a controllable strategy. The composite displayed excellent electrochemical performance due to the synergistic effect of SnS 2 and CF. The SnS 2 @CF‐2 composite containing 23.92 wt% of SnS 2 has a superior specific capacitance of 283.6 F g −1 at the current density of 1 A g −1 . Moreover, a symmetric supercapacitor based on SnS 2 @CF‐2 composite has a capacitance of 82.5 F g −1 at 1 A g −1 and a high energy density of 13.9 Wh kg −1 at the power density of 551.7 W kg −1 .