【摘要】 本文以化学沉淀法制备出立方体Cu₂O,以Cu₂O为模板用水热离子交换法制备出纳米Cu₇S₄。利用X-射线衍射仪（XRD）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）对Cu₇S₄进行测试,结果显示Cu₇S₄具有中空立方体结构,平均尺寸在550nm左右。使用三电极体系,采用循环伏安法、恒流充放电、电化学阻抗谱和循环稳定性分析研究了Cu₇S₄的电化学性能。测试结果表明,当电流密度为1A·g^-1时,Cu₇S₄的比电容为275F·g^-1。在电流密度为4A·g^-1时,Cu₇S₄循环1000次仍能保留94.8%的比电容,展示出良好的循环性能。更多还原

【Abstract】 Cu₂O was synthesized by chemical precipitation,then nano Cu₇S₄ was synthesized via a hydrothermal ion-exchange method using the Cu₂O as the template.Characterizations of the product using Xray diffraction （XRD）,scanning electron microscopy （SEM） and transmission electron microscopy （TEM） show that the Cu₇S₄ has a hollow cubic structure,with an average size of ⁵50nm.Electrochemical performance of the Cu₇S₄ was investigated by cyclic voltammetry,galvanostatic charge-discharge,electrochemical impedance and cycle stability test with a three-electrode system.The test results show that the specific capacitance of the material is 275F·g^-1 at a current density of 1A·g^-1.At 4 A·g^-1,it can retain94.8% of the specific capacitance after 1000 cycles,showing good cycling stability.更多还原