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High-Performance Flexible Asymmetric Supercapacitors Based on MXene/MOF-Derived Fe2O3 Heterointerfaces
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High-Performance Flexible Asymmetric Supercapacitors Based on MXene/MOF-Derived Fe2O3 Heterointerfaces
The research team led by Professor Seong Chan Jun of the School of Mechanical Engineering (first author: Taehyeon Kim, M.S.) has developed a flexible supercapacitor based on a hybrid electrode combining MXene and a metal-organic framework (MOF). Conventional carbon-based flexible electrodes are lightweight and highly bendable but suffer from limited energy storage capacity; to overcome this, the team fabricated a negative electrode by roll-coating MXene with MOF-derived Fe2O3, while directly growing MOF-derived MnCo2O4 on carbon cloth to serve as the positive electrode. The resulting MXene/Fe2O3 negative electrode achieved a high specific capacitance of 421 F/g, and the assembled asymmetric supercapacitor retained an impressive 92.2% of its capacitance even after 10,000 charge-discharge cycles. Furthermore, density functional theory (DFT) calculations revealed the electronic structure changes and charge-transfer mechanisms at the MXene-Fe2O3 interface, and the device maintained stable performance under mechanical deformation such as folding and unfolding, successfully powering an LED to demonstrate its practicality for wearable energy storage applications. This research—spanning electrode material design, device fabrication, and real-world demonstration—was published in Chemical Engineering Journal (IF: 12.5, JCR top 4%).