多壳层中空CoFe2O4复合物微球锂离子电池负极材料的研究

Multi-hollow CoFe2O4 Microspheres as High-performance Anode for Lithium-ion Battery

本文通过简单的水热合成方法制备了多壳层中空CoFe2O4复合物微球,利用扫描电子显微镜(SEM)、透射电子显微镜(TEM)、X射线衍射(XRD)和X射线光电子能谱(XPS)对微球的表面形貌和物相组成等进行了表征,并作为负极材料研究了其储锂性能。结果表明,由于具备的多壳层中空微球结构和异原子的掺杂使金属间的协同作用得到发挥,其初始容量达到1 330.75mAh g^-1,并表现出相对稳定的循环性能,在350次循环后能够保持701mAh g^-1的稳定容量。

We report the synthesis and characterization of multi-shell hollow microspheres cobalt ferrite(CoFe2O4)with the larger surface area,short diffusion lengths,large volume change and abundant active sites as an ideal anode for lithium-ion battery application.The initial discharge capacity reached 1 330.75mAh g^-1,and maintain a high capacity of 701mAh g^-1 after 350cycles at a current density of 500mA g^-1,achieving excellent lithium storage capacity.