Two-dimensional covalent triazine frameworks for advanced electrochemical energy storage applications

Abstract

Two-dimensional covalent triazine frameworks (2D CTFs) are novel conjugated porous polymers created from organic monomers through covalent bonding with triazine structural units, which have emerged as a focal point of research in electrochemical energy storage owing to their distinctive physicochemical characteristics, including high specific surface area, adjustable pore structure, and superior electrochemical stability. The utilization of 2D CTFs in diverse electrochemical energy storage systems, including lithium-, sodium-, potassium- and zinc-ion batteries, as well as supercapacitors, not only demonstrates the enhancement of the energy and power densities of these devices, but also promotes their cycling stability and rate performance. This review aims to discuss the advancements of 2D CTFs in diverse energy storage devices in recent years, focusing on the structure-activity relationship of their unique 2D morphology/structure and physicochemical properties to improve battery performance. Finally, it also provides an outlook on current challenges and future trajectory of 2D CTFs in the field of electrochemical energy storage.