High electrochemical energy-storage performance promoted by SnSe nanorods anchored on rGO nanosheets

There have been few studies on tin selenide (SnSe) as a supercapacitor electrode. In this paper, SnSe nanorods were obtained via a simple, solvothermal, one-step method, then its modification by reduced graphene oxide (rGO) was studied. SnSe/rGO composites with different rGO ratios were prepared and the electrochemical measurements showed that the best electrochemical performance among them was SnSe/7rGO which showed a good electrochemical efficiency exhibiting a capacitance of 568 F g(-1) at 1 A g(-1). A hybrid supercapacitor device was prepared using SnSe/7rGO as a positive electrode and activated carbon as a negative electrode to further investigate the electrochemical efficiency of this material. The produced device exhibited a specific energy of 30.5 Wh kg(-1) at a specific power of 1.007 kW kg(-1) and still maintained 4 Wh kg(-1) at a power density of 1.24 kW kg(-1). The obtained results suggesting that the as-synthesized electrode has great potential in applications of supercapacitors.

Automated summary

The study focused on tin selenide (SnSe) as a supercapacitor electrode, obtaining SnSe nanorods via a simple method and studying its modification with reduced graphene oxide (rGO). The SnSe/7rGO composite exhibited the best electrochemical performance, showing potential for applications in supercapacitors.