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通过直接退火静电纺丝前驱样品以及调节升温速率最终得到了钴酸镍(NiCo2O4)微米带.通过X射线衍射、扫描电镜、振动样品磁强计以及电化学工作站等分析手段对钴酸镍微米带的晶体结构、形貌、磁学性能以及电化学性能进行了研究.结果显示,以1°C·min-1的升温速率得到的NiCo2O4微米带属于立方尖晶石结构,高温处理后仍能保持一维结构.室温磁化结果显示制备的NiCo2O4微米带具有超顺磁性,在10kOe时磁化强度为6.35emu·g-1.此外,电化学测试结果显示,NiCo2O4微米带的电容特性是典型的赝电容,并且比电容随着放电电流密度的增加而减小.
The nanocrystalline NiCo2O4 microspheres were obtained by directly annealing the electrospinning precursor sample and adjusting the heating rate. The microstructure of NiCo2O4 microspheres was characterized by X-ray diffraction, scanning electron microscopy, vibrating sample magnetometer and electrochemical workstation. The crystal structure, morphology, magnetic properties and electrochemical properties of NiCo2O4 microspheres were investigated. The results show that the NiCo2O4 microspheres with a heating rate of 1 ° C · min-1 belong to the cubic spinel structure and remain after high temperature treatment One-dimensional structure. The results of magnetization at room temperature show that the prepared NiCo2O4 microstrip has superparamagnetism and the magnetization is 6.35emu · g-1 at 10kOe. In addition, the electrochemical test results show that the capacitance characteristic of NiCo2O4micronband is typical pseudocapacitance , And the specific capacitance decreases as the discharge current density increases.