Nitrogen-doped carbon decorated 3D NiCoSe micro-flowers as high-performance anode materials for lithium-ion batteries.

Compared with monometallic selenides, bimetallic selenides have better synergistic effects and more abundant active sites for electrochemical reactions. As an important member of the transition metal oxide family, NiCoSe has been widely used in energy storage devices and has shown excellent electrochemical performance. So in this paper, nitrogen-doped carbon decorated NiCoSe composites (NiCoSe/NC-700, NiCoSe/NC-800, and NiCoSe/NC-900) with a microflower structure were synthesized by calcining nickel-cobalt bimetallic organic skeleton materials at different temperatures, and were used as anode materials for rechargeable lithium-ion batteries.

Enhancing Lithium Storage Performances of the LiTiO Anode by Introducing the CuVO Phase.

The low electronic conductivity of spinel-structured LiTiO could be improved by introducing CuVO. Herein, several LiTiO/CuVO composites with different CuVO contents have been successfully prepared by a facile liquid-phase dispersion technique. The amount of CuVO in composites is shown to affect the particle size and electrochemical performances of LiTiO.

Modification Effects of B₂O₃ on The Structure and Catalytic Activity of WO₃-UiO-66 Catalyst.

Tungsten oxide (WO₃) and boron oxide (B₂O₃) were irreversibly encapsulated into the nanocages of the Zr-based metal organic framework UiO-66, affording a hybrid material B₂O₃-WO₃/UiO-66 by a simple microwave-assisted deposition method. The novel B₂O₃-WO₃/UiO-66 material was systematically characterized by X-ray diffraction, Fourier transform infrared spectroscopy, N₂ adsorption, ultraviolet⁻visible diffuse reflectance spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray phosphorescence, and Fourier transform infrared (FTIR)-CO adsorption methods. It was found that WO₃ and B₂O₃ were highly dispersed in the nanocages of UiO-66, and the morphology and crystal structure of UiO-66 were well preserved.