Complex cobalt sulfide nanobubble cages with enhanced electrochemical properties

• Main Authors: Guan, Bu Yuan, Lou, David Xiong Wen
• Other Authors: School of Chemical and Biomedical Engineering
• Format: Article
• Language: English
• Published: 2020
• Subjects: Engineering::Chemical engineering; MOF Composites; ZIF-67
• Online Access: https://hdl.handle.net/10356/139968
• Institution: Nanyang Technological University

Metal-organic frameworks (MOFs) have been widely employed as precursors to prepare various nanostructured functional materials. Here we report a “nanoparticles-in-MOF” dual-template approach for generating complex cobalt sulphide (CoS) nanobubble cages. A novel nanoparticles-in-MOF hybrid structure consisting of a Co-based MOF polyhedron host and many encapsulated mesostructured TiO2 nanospheres is first prepared, followed by a sulfidation process to obtain a complex cage structure consisting of CoS nanobubbles in the shell. Importantly, this strategy can be extended to prepare many other functional nanoparticles-in-MOF hybrid structures. When evaluated as an electrode material for hybrid supercapacitors, the as-derived CoS nanobubble cages manifest remarkable electrochemical performance with long cycle life and good rate capability.