Formation of conductive MOF@Metal oxide micro-nano composites via facile self-assembly for high-performance supercapacitors

Metal-organic frameworks (MOFs), which are promising electrode materials, have been explored for clean energy applications such as electrochemical energy storage. In this study, to enhance the electrical conductivity without decreasing ion transfer efficiency and to balance both activity and stability, we used metal oxides that can directly react with organic ligands and consequently produce their micronanocrystallized composites. Furthermore, we investigated the growth process by adjusting the reaction time and by determining the relationship between facet exposure and reaction time. Subsequently, we tested their electrochemical performance and demonstrated that specific facet exposure and small size are critical for achieving high capacitance. This reveals not only the influence of the reaction time on the morphology of conductive MOF composites and size but also the influence of morphology and size on the electrochemical performance. (C) 2022 Elsevier Ltd. All rights reserved.

Automated summary

This study explores the use of metal oxides to enhance the electrical conductivity and balance the activity and stability of metal-organic frameworks (MOFs). The researchers investigate the growth process by adjusting the reaction time and examining the relationship between facet exposure and reaction time. They find that specific facet exposure and small size are crucial for achieving high capacitance in MOFs. The study highlights the influence of reaction time, morphology, and size on the electrochemical performance of MOF composites.