Carbon supported Co9S8 hollow spheres assembled from ultrathin nanosheets for high-performance supercapacitors

• The spheres are rationally designed and synthesized via a facile solution-based method.
• The as-prepared spheres exhibit high surface area and excellent structural stability.
• The spheres demonstrate significantly enhanced electrochemical performance for supercapacitors.

UltrathinCo9S8nanosheets were successfully assembled into a carbon supported nanostructure of C@Co9S8core-shell hollow spheres by a facile solution-based method consisting of template-engaged growth of a precursor shell, followed by simultaneous sulfidation and removal of template. The prepared C@Co9S8hollow spheres exhibit enhanced electrochemical performance in supercapacitors due to their high surface area and excellent structural stability.

Carbon supported Co9S8hollow spheres (C@Co9S8) assembled from ultrathin nanosheets are prepared via a facile solution-based approach including the template-engaged growth of precursor shell followed by simultaneous sulfidation and template removal. The as-fabricated hierarchical hollow spheres possesses a high specific surface area (266 m2 g−1) with good structural stability, and exhibit high specific capacitance with excellent cycling performance as electrode materials for supercapacitors.Figure optionsDownload as PowerPoint slide