普鲁士蓝类似物衍生负极材料储钾电化学性能研究

Electrochemical properties of Prussian blue analog-derived anode materials for potassium storage

通过常温离子交换制备出多孔普鲁士蓝类似物(FeZnCo-PB),然后高温退火处理获得衍生材料(FeZnCoPB-500),并将其作为钾离子电池负极极材料。对目标产物进行了SEM、TEM、XRD、BET表征,研究了FeZnCo-PB-500电极材料的形貌和结构。FeZnCo-PB-500负极材料展现出优异的储钾性能(长循环稳定性和高倍率性能)。在100和1000 mA/g的电流密度下,FeZnCo-PB-500电极分别循环200圈和400圈后可逆容量还能分别达到236 mAh/g和151 mAh/g。

Porous Prussian blue analogs(FeZnCo-PB)was prepared by ion exchange at room temperature,and then annealed at high temperature to obtain derivative materials(FeZnCo-PB-500),which were used as anode materials for potassium ion batteries.The target product was characterized by SEM,TEM,XRD and BET,and the morphology and structure of FeZnCo-PB-500 electrode were studied.The FeZnCo-PB-500 anode material exhibits excellent potassium storage performance(long-cycle stability and high-rate capability).At current densities of 100 and 1000 mA/g,the FeZnCo-PB-500 electrode can achieve reversible capacities as high as 236 mAh/g and 151 mAh/g after 200 and 400 cycles,respectively.