以碳球为模板，通过吸附过渡金属阳离子在空气下煅烧后制备Ni-Mn氧化物纳米空心球。利用XRD、FESEM、TEM以及HRTEM对样品的形貌、结构等进行表征，并利用电化学工作站对样品的电化学性能进行测试。结果表明，Ni-Mn氧化物纳米空心球具有较大的比容量，电流密度为1 A/g时的比容量为592 F/g；电流密度为20 A/g时比容量仍有418 F/g。5 A/g电流密度下循环1 000次容量保持率为92.8%，具有良好的电化学性能。

Ni-Mn oxide hollow nanospheres are synthesized by calcination of carbon spheres template that has adsorbed transition metal ions.Morphology and structure of the samples are characterized by XRD,FESEM,TEM and HRTEM.Electrochemical properties of the sample are tested by electrochemical workstation.It is shown that Ni-Mn oxide hollow nanospheres have higher specific capacity,with a specific capacity of 592 F·g^-1 at a current density of 1 A·g^-1,and they still remain a specific capacity at 418 F·g^-1 at a current density of 20 A·g^-1.Their capacity retention is 92.8% after 1 000 cycles at a current density of 5 A·g^-1.In short,Ni-Mn oxide hollow nanospheres have good electrochemical performance.

刘晓雨(1994-),女,硕士研究生,主要从事超级电容器电极材料的研究,lrliuxiaoyu@163.com