MOFs-derived advanced heterostructure electrodes for energy storage

To satisfy the ever-growing demand for electrochemical energy storage devices, significant research efforts have been devoted to developing promising electrode materials and uncovering the energy storage mechanism. Recently, the construction of MOFs-derived heterostructures for electrode materials has received a great deal of attention since it is a reasonable way to optimize energy storage performance by combining the merits of building blocks while neutralizing the drawbacks, which could greatly enhance the capacity and rate performance. Moreover, MOFs-derived heterostructures with highly structurally and compositionally tunable can be easily customized and applied to different electrochemical energy storage devices. In this review, a comprehensive overview on the structural features and mechanism of MOFs-derived heterostructures, including unique pore structure and large surface area, built-in electric fields, and abundant phase boundaries, which could facilitate the penetration of electrolyte, enhance electrical conductivity and promote ion diffusion kinetics, is firstly presented. Thereafter, the classification and synthesis strategies for MOFs-derived heterostructures are also described. Next, the recent progress of MOFs-derived heterostructures in lithium-ion batteries (LIBs), sodium-ion batteries (SIBs), lithium-sulfur batteries (Li-S batteries), supercapacitors (SCs), and other energy storage devices are discussed. Finally, the challenges and future outlook of promising MOFs-derived heterostructures for electrochemical energy storage are concluded.