摘要
采用一步溶剂热法,以Fe^(2+)为铁源制备了Fe_(3)O_(4),并将其作为超级电容器的负极活性材料。通过XRD、SEM、TEM等表征手段结合电化学测试技术研究了Fe_(3)O_(4)的微观结构及电化学性能。调节溶剂热过程中1,2-丙二醇(PG)的添加量,可以得到不同形貌的Fe_(3)O_(4),最适宜制备工艺下制备的八面体状Fe_(3)O_(4)在1 A·g^(-1)时比电容为218.7 F·g^(-1)。以Fe_(3)O_(4)为负极,MnO_(2)为正极,组装扣式混合超级电容器(ASC),在5 A·g^(-1)的电流密度下经5000次循环后,ASC的比电容保持率为70%,器件循环稳定性良好。证明Fe_(3)O_(4)作为低成本铁基超级电容器负极材料,具有较高的应用价值。
Fe_(3)O_(4)was prepared by the one-step solvothermal method using Fe^(2+)as the iron source,and it was used as the anode active material for supercapacitors.The microstructure of Fe_(3)O_(4)and its electrochemical properties were investigated by XRD,SEM,TEM and other characterization means combined with electrochemical testing techniques.By adjusting the addition of 1,2-propanediol(PG)during the solvothermal process,Fe_(3)O_(4)with different morphologies can be synthesized.The octahedral Fe_(3)O_(4)with the best preparation process has a specific capacitance of 218.7 F·g^(-1)at 1 A·g^(-1).The hybrid supercapacitor(ASC)was assembled with Fe_(3)O_(4)as the anode and MnO_(2)as the cathode.After 5000 cycles at a current density of 5 A·g^(-1),the ASC showed a specific capacitance retention rate of 70% for good cycling stability.This demonstrates that Fe_(3)O_(4)has great application value as the low-cost iron-based supercapacitor anode material.
作者
张卫国
杨盼
王宏智
姚素薇
ZHANG Weiguo;YANG Pan;WANG Hongzhi;YAO Suwei(School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China;Tianjin University of Sport,Tianjin 301617,China)
出处
《化学工业与工程》
北大核心
2025年第4期18-26,共9页
Chemical Industry and Engineering
