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. Supercapacitors, 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 Fe-MOFs. 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.