Abstract In this study, we have synthesized metal oxide/metal sulphide based nanoheterostuctures mediated with graphene nanosheets. The synthesized nanoheterostructures were characterized via different techniques such as XRD, XPS, and TEM. The electrochemical characteristics of the investigated nanoheterostucture (CdS/rGO/CeO2) were investigated through electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV), and galvanostatic charge-discharge. The specific capacitance of the single rGO, binary CdS/CeO2 and ternary CdS/rGO/CeO2 heterostructures were measured. The CdS/rGO/CeO2 nanoheterostucture showed the most excellent cycling stability with high specific capacitance of 407 F g−1 achieved at a charge-discharge rate of 1 A/g. The investigated supercapacitor retained about 96% of the initial energy density after charge-discharge at a 10 A/g for 5000 cycles. The ternary CdS/rGO/CeO2 nanoheterostucture revealed the best specific capacitance as the graphene nanosheets increased interfacial electron transfer. The results revealed that the investigated novel nanoheterostucture is among the best reported ones in the literature.

中文翻译：

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基于新型超级电容器电极的 CdS/rGO/CeO 2 半导体纳米异质结构作为有效候选物

摘要 在本研究中，我们合成了由石墨烯纳米片介导的基于金属氧化物/金属硫化物的纳米异质结构。通过 XRD、XPS 和 TEM 等不同技术对合成的纳米异质结构进行表征。通过电化学阻抗谱 (EIS)、循环伏安法 (CV) 和恒电流充放电研究了所研究的纳米异质结构 (CdS/rGO/CeO2) 的电化学特性。测量了单个 rGO、二元 CdS/CeO2 和三元 CdS/rGO/CeO2 异质结构的比电容。CdS/rGO/CeO2 纳米异质结构表现出最优异的循环稳定性，在 1 A/g 的充放电速率下实现了 407 F g-1 的高比电容。所研究的超级电容器在以 10 A/g 的电流充放电 5000 次循环后保留了约 96% 的初始能量密度。随着石墨烯纳米片增加界面电子转移，三元 CdS/rGO/CeO2 纳米异质结构显示出最佳的比电容。结果表明，所研究的新型纳米异质结构是文献中报道最好的结构之一。