Hollow Co 9 S 8 from metal organic framework supported on rGO as electrode material for highly stable supercapacitors

Abstract Metal sulfides as a feasible candidate with high specific capacitance for supercapacitors suffer from sluggish ion/electron transport kinetics and rapid capacitance fading. Herein, we demonstrate a method to fabricate a composite of reduced graphene oxide (rGO) with hollow Co 9 S 8 derived from metal organic framework (MOF). Due to the combined highly conductive rGO substrates and hollow shell, the prepared rGO/Co 9 S 8 composite exhibits a high specific capacitance of 575.9 F/g at 2 A/g and 92.0% capacitance retention after 9000 cycles. Its excellent electrochemical performance provides great promise for application, and this versatile method can be extended to prepare other similar nanocomposite.