Surfactant-Free Aqueous Synthesis of Pure Single-Crystalline SnSe Nanosheet Clusters as Anode for High Energy-and Power-Density Sodium-Ion Batteries

SnSe with 3D hierarchical nanostructure composed of interconnected single-crystal SnSe nanosheets is synthesized via a fast and effective strategy. Unexpectedly, when used as the anode material for Na-ion batteries (NIBs), the SnSe exhibits a high capacity (738 mA h g(-1)), superior rate capability (40 A g(-1)), and high energy density in a full cell. These results provide the possibility of SnSe use as NIBs anodes.