新型负极材料MnNb_2O_6的电化学性能研究

Electrochemical Properties of MnNb_2O_6 as A New-type Anode Material

利用高温固相反应法合成了MnNb_2O_6,研究其作为锂电池负极材料的电化学性能.通过X射线衍射技术和电化学性能测试对MnNb_2O_6的微观结构和电化学性能进行了表征.测试结果表明,该材料为正交结构,空间群为Pcan.电化学性能测试表明,在电压范围0~3.0 V内,以16 m A/g的电流密度,其初始放电比容量达145.3 m Ah/g,50次循环后容量保持在84.3 m Ah/g.

MnNb_2O_6 is synthesized by solid state reaction method and its electrochemical properties are dis-cussed as a new anode material for Li-ion battery. The microstructure and electrochemical performance of Mn-Nb2O6 have been investigated by X-ray diffraction and electrochemical tests. It is indicated that MnNb_2O_6 hasan orthorhombic structure and its space group is Pcan. The discharge capacity of MnNb_2O_6 electrode is 145.3m Ah/g at initial cycle between 0.001 and 3.0 V at a current density of 16 m A/g and maintained 84.3 m Ah/g af-ter 50 cycles.