In this work, we developed a hierarchical hybrid electrode, termed P2MC (PANI:PSS/2D Fe-BTC MOF/Fe-electrodeposited Carbon fiber cloth), by sequentially constructing Fe-BTC MOF nanosheets on Fe-electrodeposited carbon fiber cloth via an in-situ growth...
In this work, we developed a hierarchical hybrid electrode, termed P2MC (PANI:PSS/2D Fe-BTC MOF/Fe-electrodeposited Carbon fiber cloth), by sequentially constructing Fe-BTC MOF nanosheets on Fe-electrodeposited carbon fiber cloth via an in-situ growth process, followed by polymerization of PANI:PSS. This design yields a mechanically stable electrode platform with seamless integration of multiscale structural domains. Such integration enables strong interfacial coupling, continuous ion/electron conduction pathways, and accelerated charge-transfer dynamics. Importantly, the introduction of PANI:PSS contributes a dual redox- active component, thereby maximizing the accessibility of electrochemically active sites throughout the electrode. Consequently, the P2MC electrode delivers a high reversible capacity of 414.9 mAh g−1 at 0.1 A g−1, while maintaining 92.2% capacity retention after 3000 cycles at 2.0 A g−1. Furthermore, it achieves an energy density of 275.2 Wh kg−1 and a peak power density of 91.7 kW kg−1. Both experimental characterization and theoretical analysis confirm that PANI:PSS and Fe-BTC primarily act as redox-active centers for Li+ and PF6− storage, respectively, while the low diffusion energy barrier (~0.059 eV) facilitates successive Faradaic processes over a broad potential window of 2.0–4.5 V. Overall, these results establish multidimensional and multiscale integration as a powerful strategy for designing high- performance and durable energy storage electrodes.