Journal of Materials Science, Vol.55, No.17, 7492-7501, 2020
Hollow spheres constructed by ultrathin SnS sheets for enhanced lithium storage
In this study, we report a hollow microsphere assembled by ultrathin SnS nanosheets prepared by a template method. Hollow ferroferric oxide (Fe3O4) spheres with abundant pores on the shell are used as templates, and SnS nanosheets can grow on the surface of the Fe3O4 shell. The key factor to obtain the unique structure of SnS sphere is the utilization of Fe3O4 template. When employed as the anode for lithium-ion battery, the SnS exhibits the better electrochemical performance than that of the bulk SnS electrode. With morphology observation and electrochemical impedance spectroscopy analysis, SnS/V-SnS electrodes are proved to possess several advantages, i.e., high specific surface area facilitates electrochemical reactions due to more active sites, shortened Li+ diffusion distance, and sufficient void space to sustain the volume change, which all contribute to its improved electrochemical performance.