Recent progress in metal-organic framework-based supercapacitor electrode materials

Supercapacitors are important energy storage devices due to its fast charging/discharging features and long cycle life. Design and fabrication of superior supercapacitor electrodes is of significance to the improvement of the overall performances of a device. Metal-organic frameworks (MOFs) have been widely reported for supercapacitor applications due to their high-tunability, including favorable porous properties, tunable chemical compositions, controllable crystal structures, and adjustable geometry morphologies. In this review, the recent reports focusing on MOF-based supercapacitor applications are elaborated. Particularly, the recyclable MOF-hydrolyzing strategy is introduced, during which the organic ligands can be recollected to drastically reduce the costs. Furthermore, challenges and perspectives of MOFs for supercapacitor electrode applications are also summarized. (C) 2020 Elsevier B.V. All rights reserved.