Facile synthesis of three-dimensional Ni3Sn2S2 as a novel battery-type electrode material for high-performance supercapacitors

Binary system sulfides hold tremendous potential for the manufacture of high-performance supercapacitors because of their rich transition states. Herein, three-dimensional Ni3Sn2S2 flower-like materials on Ni foam are ingeniously created via a simple one-pot hydrothermal and ion corrosion for employing as the electrode material in supercapacitors for the first time. According to the morphology in different reaction time, the growth mechanism of the flower-like Ni3Sn2S2 is further proposed. The morphology of as-prepared optimal sample indicates that the space of material is fully utilized to form a favorable compound structure with interconnected and uniformly branched nanosheets on the surface of polyhedrons. Electrochemical measurement reveals that Ni3Sn2S2 has a high area-specific capacitance of 0.67 mAh cm(-2) at a current density of 2 mA cm(-2). Impressively, the hybrid supercapacitor assembled with Ni3Sn2S2/Ni foam cathode and commercial activated carbon anode delivers a maximum energy density of 4.65 mWh cm(-3) at a power density of 29.64 mW cm(-3). Two devices in series can lit up 22 blue Light-Emitting Diodes more than 130 min. On the strength of outstanding electrochemical performances, Ni3Sn2S2 is a novel and promising electrode material for supercapacitor. (C) 2021 Elsevier Ltd. All rights reserved.

Automated summary

Binary system sulfides, particularly Ni3Sn2S2, are promising materials for high-performance supercapacitors due to their rich transition states. A 3D flower-like Ni3Sn2S2 material was successfully created and its growth mechanism was proposed. Electrochemical measurements demonstrated that Ni3Sn2S2 has high area-specific capacitance and energy density, making it a novel and potential electrode material for supercapacitors.