Ultrasmall SnS Quantum Dots Anchored onto Nitrogen-Enriched Carbon Nanospheres as an Advanced Anode Material for Sodium-Ion Batteries.

Structural pulverization of metal chalcogenides such as Sn-based compounds is a serious issue for development of high-performance anode materials and results in serious capacity fading during continuous charge and discharge cycles. In this work, we synthesize ultrasmall SnS quantum dots (QDs) anchored onto nitrogen-enriched carbon (NC) nanospheres through facile hydrothermal and carbonization processes to prepare a progressive anode material for sodium-ion batteries. The optimized SnS QDs@NC electrode delivered an initial discharge capacity of 281 mAh g at 100 mA g and exhibited excellent cycling stability with a capacity retention of 75% after 500 cycles at a high current density of 1000 mA g.

Metal-organic-framework-derived hierarchical Co/CoP-decorated nanoporous carbon polyhedra for robust high-energy storage hybrid supercapacitors.

Electrode materials exhibiting nanostructural design, high surface area, tunable pore size, and efficient ion diffusion/transportation are essential for achieving improved electrochemical performance. In this study, we successfully prepared cobalt phosphide and cobalt nanoparticles embedded into nitrogen-doped nanoporous carbon (CoP-CoNC/CC) using a simple precipitation method followed by pyrolysis-phosphatization. Subsequently, we employed CoP-CoNC/CC as the electrode for supercapacitor applications.

Preparation of Copper Sulfide Nanoparticles by Sonochemical Method and Study on Their Electrochemical Properties.

Copper sulfide (CuS) nanoparticles have been prepared by a facile sonochemical method using copper nitrate and thiourea as precursors. The X-ray diffraction analysis revealed the formation of hexagonal CuS. The Field-emission scanning electron microscope showed the formation of CuS nanoparticles with size in the range of 50 nm.