A self-templated strategy to synthesize CuS/C nanoparticles derived from Cu-BTC (copper(II)-benzene-1,3,5-tricarboxylate) is demonstrated by proper sulfurization and annealing process. The generation of carbon provided conductive pathways all over the composite and enhanced the electrochemical characteristics. CuS is a faradic metal sulfide with a high theoretical capacitance. Thus, this CuS/C heterostructure is a promising candidate material for electrochemical applications. Optimized CuS/C samples were obtained by tracking the formation and morphologies of CuS detailed X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermogravimetric analysis (TGA) and X-ray photoelectron spectrometry (XPS) analysis. The best CuS/C sample exhibited a high specific capacitance of 583F g at a scan rate of 5 m Vs for supercapacitor application. It was further tested for lithium-ion batteries and provided a value of 668 mAh g at a current density of 0.1 A g. Therefore, our simple strategy for fabrication of hybrid materials comprising copper sulfide and carbon paves the way for future applications in high-performance energy storage systems.

中文翻译：

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用于电化学应用的 CuxS-C 混合结构电极的模板辅助制造

通过适当的硫化和退火工艺，证明了一种自模板策略，可以合成源自 Cu-BTC（1,3,5-三羧酸铜（II）-苯）的 CuS/C 纳米颗粒。碳的产生为整个复合材料提供了导电通路，并增强了电化学特性。 CuS 是一种法拉第金属硫化物，具有高理论电容。因此，这种 CuS/C 异质结构是电化学应用中有前途的候选材料。通过跟踪 CuS 详细 X 射线衍射 (XRD)、扫描电子显微镜 (SEM)、透射电子显微镜 (TEM)、热重分析 (TGA) 和 X 射线光电子能谱 (X 射线光电子能谱) 的形成和形貌，获得了优化的 CuS/C 样品。 XPS）分析。最好的 CuS/C 样品在 5 m Vs 的扫描速率下表现出 583F g 的高比电容，适合超级电容器应用。进一步对锂离子电池进行测试，在0.1 A g的电流密度下提供了668 mAh g的值。因此，我们制造包含硫化铜和碳的混合材料的简单策略为未来在高性能储能系统中的应用铺平了道路。