Tuning Interface Bridging Between MoSe2 and Three-Dimensional Carbon Framework by Incorporation of MoC Intermediate to Boost Lithium Storage Capability

Interface engineering has been widely explored to improve the electrochemical performances of composite electrodes, which governs the interface charge transfer, electron transportation, and structural stability. Herein, Mo C is incorporated into MoSe/C compos-ite as an intermediate phase to alter the bridging between MoSe- and nitrogen-doped three-dimensional(3 D) carbon framework as MoSe/Mo C/N–C connection, which greatly improve the structural stability, electronic conductivity, and interfacial charge transfer. Moreover, the incorporation of Mo C into the composites inhibits the overgrowth of MoSenanosheets on the 3 D carbon framework, producing much smaller MoSenanodots. The obtained MoSenanodots with fewer layers, rich edge sites, and heteroatom doping ensure the good kinetics to promote pseudo-capacitance contributions. Employing as anode material for lithium-ion batteries, it shows ultralong cycle life(with 90% capacity retention after 5000 cycles at 2 A g) and excellent rate capability. Moreover, the constructed Li Fe PO4//MoSe/Mo C/N–C full cell exhibits over 86% capacity retention at 2 A g~(-1 after 300 cycles. The results demonstrate the e ectiveness of the interface engineering by incorporation of Mo C as interface bridging intermediate to boost the lithium storage capability, which can be extended as a potential general strategy for the interface engineering of composite materials.