Co₉S₈ nanoparticles embedded into amorphous carbon as anode materials for lithium-ion batteries

In this paper, Co₉S₈ nanoparticles embedded into amorphous carbon have been synthesized by a simple electrospinning method followed by a high-temperature annealing process. The unique structure endows the Co₉S₈/C composites with excellent electrochemical properties. Co₉S₈ particles embedded into the carbon matrix show a high Li storage capacity around 1100 and 358 mAhg^-1 at a current density of 0.1 and 5.0 Ag^-1, respectively. After 200 cycles, an impressive discharge capacity of around 1063.4 mAhg^-1 can be obtained at a current density of 0.3 Ag^-1.