A free-standing electrode based on2D SnS(2)nanoplates@3Dcarbon foam for high performance supercapacitors

摘要

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 SnS2@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 SnS2@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).