以静电纺丝技术为基础，组装含有金属有机框架MIL-88的氮掺杂复合纳米纤维。经过高温退火制备氮掺杂的含有Fe₃C的碳纳米纤维（N-Fe₃C-CNFs）。通过SEM、TEM、XRD、XPS对该材料的微观形态结构进行表征，并以此材料作为锂离子电池的负极材料对电池的循环性能、倍率性能、CV以及阻抗（EIS）等电化学性能进行研究。结果表明，当电流密度为1 A/g时，此材料循环200圈后仍具有756.6 mAh/g的可逆比容量。

Nitrogen-doped composite nanofibers containing metal-organic framework MIL-88 are assembled based on electrospinning technique.Subsequently,nitrogen-doped Fe₃C-containing carbon nanofibers (N-Fe₃C-CNFs) are prepared via high-temperature annealing.The nanostructure and morphology of the material are characterized by SEM,TEM,XRD and XPS.The electrochemical properties of lithium-ion battery that employs the prepared N-Fe₃C-CNFs as anode material are studied,including cycle performance,rate performance,CV and electrochemical impedance spectroscopy (EIS) performance.Studies indicate that the prepared material maintains a reversible specific capacity of 756.6 mA·h·g^-1 after 200 cycles at a current density of 1.0 A·g^-1.

姜志浩(1993-),男,硕士研究生,研究方向为锂离子电池,862374726@qq.com