为了进一步提高普鲁士蓝的电化学性能，通过控制温度和添加剂，运用共沉淀法进行铁离子掺杂，成功合成了Na₂Co_xFe_yFe （CN）₆正极材料，并对其进行XRD、SEM、TG和电化学性能测试。结果表明，在0.1 C电流密度下，初始比容量由未掺杂时的125.3 mAh/g上升到164.6 mAh/g，达到理论容量的96.8%。经过100圈充放电循环后，仍保持83.1 mAh/g的高容量。在5 C大电流密度的充放电测试下，比容量也由未掺杂时的28.3 mAh/g上升到47.8 mAh/g。材料表现出了优异的电化学性能。

In order to further improve the electrochemical performance of Prussian blue,Na₂Co_xFe_yFe(CN)₆ cathode material is successfully synthesized through controlling temperature and additives,and using coprecipitation method to dope iron ion.The material is tested by means of XRD,SEM and TG,and its electrochemical performance is also determined.Results show that the initial specific capacity of the doped material at a current density of 0.1 C increases from 125.3 mAh·g^-1 without doping to 164.6 mAh·g^-1,reaching 96.8% of the theoretical capacity.After 100 cycles of charge and discharge,it still maintains a high capacity of 83.1 mAh·g^-1.Under the charge and discharge test at 5 C of current density,its specific capacity also increases from 28.3 mAh·g^-1 without doping to 47.8 mAh·g^-1.The material shows excellent electrochemical properties.

王壮(1996-),男,硕士研究生,研究方向为钠离子电池正极材料,1207330501@qq.com