Iron-based metal-organic frameworks and their derivatives for high-performance supercapacitors

As energy demand continues to rise, electrochemical energy storage has garnered substantial attention. Super-capacitors, renowned for their high power density and long cycle life, have been extensively studied as complementary devices to batteries. Iron-based metal-organic frameworks (Fe-MOFs) and their derivatives have emerged as promising candidates for supercapacitor anode materials due to their abundant pore structures and redox sites. This review offers a comprehensive summary of recent research on Fe-MOFs and their derivatives as supercapacitor electrode. It introduces the synthesis and physical and electrochemical properties of Fe-MOFs, and delves into their energy storage mechanisms, with a focus on their application in supercapacitors. It encompasses Fe-MOFs, Fe-MOF derivatives, iron-based bimetallic MOFs, and composite materials derived from FeMOFs. Additionally, it briefly explores the use of other metal MOFs in supercapacitors. The design and utilization of Fe-MOF and its derivatives as electrode materials are discussed, including the impact of carbonization on their performance and their interaction with aqueous electrolytes. This review concludes with a summary and outlook on Fe-MOFs and their derivatives as supercapacitor electrode, aiming to provide valuable insights and guidance for future research in this field.