Ag Nanoparticles Loaded on FeCo-MOF as High-Performance Lithium-Ion Battery Anode

The development of electrode materials that combine high scalability with outstanding electrochemical performance is crucial for advancing lithium-ion battery technologies. Among various anode material systems, bimetallic organic frameworks have attracted extensive attention due to their ability to provide additional active sites and generate significant synergistic enhancement effects through the introduction of two distinct metal centers. However, their practical application in lithium-ion batteries is hindered by limited electron transport and insufficient structural stability during cycling. Therefore, we adopt a photoredox strategy to in situ deposit Ag nanoparticles on the surface of FeCo-MOF and successfully fabricated the Ag@FeCo-MOF composite anode material. The excellent electrochemical performance is primarily attributed to the high specific surface area of the MOF carrier and the synergistic effect of the bimetallic active sites. Meanwhile, the successful loading of Ag nanoparticles has constructed an efficient three-dimensional conductive network, increasing electronic conductivity by 100 times and significantly accelerating electron transport kinetics. Electrochemical tests indicate that the initial discharge specific capacity of Ag@FeCo-MOF is 534.2 mAh g−1 at a current density of 500 mA g−1, with Coulombic efficiency exceeding 98%. After 500 cycles, the discharge capacity remains at 513.9 mAh g−1 without significant decay.