NC@BiS Nanospheres as High-Performance Anode Materials for Lithium-Ion Batteries.

BiS holds immense potential to be promoted as an anode material for lithium-ion batteries (LIBs), owing to the high theoretical gravimetric and volumetric capacities. However, the poor electrical conductivity and volume expansion during cycling hinder the practical applications of BiS. Therefore, through subsequent heat treatment, the nitrogen-doped carbon film was successfully loaded on the nanosphere BiS, which we call nitrogen-rich carbon layer-coated BiS (NC@BiS).