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通过水热法成功合成Co3O4/Cu O复合物,并探索十六烷基三甲基溴化铵(CTAB)和聚乙烯吡咯烷酮(PVP)对其形貌和性能的影响。用X射线衍射仪(XRD)、扫描电子显微镜(SEM)、透射电子显微镜(TEM)和氮气吸附-脱附测试表征其微观结构和表面形貌。采用循环伏安、恒流充放电和交流阻抗测试等方法研究样品的电化学性能。结果表明,多孔Co3O4/Cu O-CTAB纳米片具有最好的电化学性能,在电流密度1 A/g下的比容量达398 F/g,而在10 A/g时其比容量仍能保持90%。此外,该复合物具有很好的循环稳定性,在2000次循环后容量几乎没有衰减。
The successful synthesis of Co3O4 / CuO composites by hydrothermal method and the effects of CTAB and PVP on their morphology and properties were explored. The microstructure and surface morphology were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and nitrogen adsorption-desorption test. The electrochemical properties of the samples were studied by cyclic voltammetry, constant current charge-discharge and AC impedance test. The results show that porous Co3O4 / CuO-CTAB nanosheets have the best electrochemical performance with a specific capacity of 398 F / g at a current density of 1 A / g and a specific capacity of 10 A / g 90%. In addition, the complex has good cycle stability with almost no attenuation of capacity after 2000 cycles.