Ball-in-ball NiS@CoS heterojunction driven by Kirkendall effect for high-performance Mg/Li hybrid batteries.

Mg/Li hybrid batteries (MLHBs), which support the rapid insertion and removal of Mg/Li bimetallic ions, are promising energy storage systems. Inspired by the Kirkendall effect, ball-in-ball bimetallic sulfides with heterostructures were prepared as cathode materials for the MLHBs. First, a nickel-cobalt precursor (NiCo-X precursor) with three-dimensional (3D) nanosheets on its surface was prepared using a solvothermal method based on the association reaction between alkoxide molecules.

Fabrication of Nitrogen-Doped Carbon-Coated NiS Quantum Dots for Advanced Magnesium-Ion Batteries.

Magnesium (Mg) batteries have garnered considerable interest because of their safety characteristics and low costs. However, the practical application of Mg batteries is hindered by the slow diffusion of Mg ions in the cathode materials. In this study, we prepared NiS quantum dot composites with nitrogen doping and carbon coating (NiS QDs@NC) using a one-step sulfurization process with NiO QDs/Ni@NC as the precursor.