Recent progress on covalent organic frameworks and their composites as electrode materials for supercapacitors

Covalent organic frameworks (COFs) represent a category of organic crystalline structures characterized with porous morphologies that can extend into two or three dimensions. Because of their intricate and adjustable pore structures and expansive and accessible surfaces, as well as their abundance of redox-active sites, COFs exhibit substantial potential in applications related to capacitive energy storage. In recent years, researchers have achieved significant advancements in utilizing COFs and materials derived from them for capacitive energy storage applications. For instance, enhanced electrochemical performance has been realized through the fabrication of COFs having distinctive structures, including covalent organic porous polymers (CMPs) and 2D materials derived from COFs. Additionally, the evolution of innovative synthesis strategies and characterization methods expands the scope of applications for COFs. In conclusion, COFs hold significant promise for capacitive energy storage applications. This paper offers a review of recent advancements towards COFs and their composites in capacitive energy applications. It also highlights their structural attributes, synthesis approaches, and applications in capacitive electrode materials. Given the depth of scientific inquiry into COFs, it is anticipated that they will assume an integral and key role in the realm of energy storage.