溶剂热法制备镍掺杂铁基金属有机骨架化合物及其储锂特性

Solvothermal Synthesis and Electrochemical Properties of Ni-doped Fe-based Metal-Organic Framework Compound for Lithium Storage

采用溶剂热合成法制备出镍掺杂的铁基金属有机骨架化合物（Fe．MOF），通过X射线衍射，扫描电子显微镜等对材料的形貌与结构进行了测试与表征，并测试了其作为锂电池负极材料的电化学性能。结果表明：材料为块状结构，颗粒大小分布为100～200nm。在电流密度为500mA／g的条件下，经过400次充放电工作循环后，容量稳定在511．8mA·Wg，相应的Coulomb效率为99.5％，显示出材料较高的比容量和优异的循环稳定性，是一种潜在的锂电池负极材料。

Nickel-doped Fe-based metal-organic framework compound （i.e., Ni-doped Fe-MOF） was synthesized by a solvothermal method. The morphology and structure of Ni-doped Fe-MOF were characterized by X-ray diffraction, scanning electron microscopy and electrochemical technique. The results show that Ni-doped Fe-MOF is a massive structure with a particle size of 100-200 nm. The Ni-doped Fe-MOF as a lithium battery anode material can deliver a stable capacity of 511.8 mA·h/g with the corresponding coulomb efficiency of 99.5% after 400 charge and discharge cycles at a current density of 500 mA/g. It is indicated that Ni-doped Fe-MOF can be used as a potential anode material.