MOF-derived transition metal alloys have attracted researcher's interest in energy storage devices due to their vast surface area, high porosity, adjustable pore sizes, ease of modification, abundant active sites, and 3D tunable structure. Metal alloys covered with carbon can stabilize conductivity and ease charge accumulation, and they are suitable candidates for electrode materials for supercapacitor application. In this research article, core-shell LaZn@C nanocomposites were fabricated at different pyrolysis times via a hydrothermal approach. The materials that pyrolysis for two hours have a remarkable specific capacitance of 1024 F g−1 at 1 A g−1 and an impressive energy density of 36.9 Whkg−1. In addition, it has lower Rp∼0.8 Ω and Rs∼0.2 Ω resistance due to the large surface area's high carbon content with cylindrical particles. Moreover, it shows an outstanding retention rate of (94.5 % over 4500 cycles at 1 A g−1). Finally, this research showed the novelty of advanced MOF-derived materials that suggest an efficient electrode material for the electrochemical performance of energy storage devices and supercapacitor applications.

中文翻译：

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轻松合成MOF衍生的碳负载LaZn@C纳米复合材料作为超级电容器的高效电极材料


MOF衍生的过渡金属合金因其巨大的表面积、高孔隙率、可调的孔径、易于改性、丰富的活性位点和3D可调结构而吸引了研究人员对储能器件的兴趣。碳覆盖的金属合金可以稳定导电性并减轻电荷积累，是超级电容器应用电极材料的合适候选者。在这篇研究文章中，通过水热方法在不同的热解时间制备了核壳LaZn@C纳米复合材料。热解两小时的材料在 1 A g−1 下具有 1024 F g−1 的显着比电容和 36.9 Whkg−1 的令人印象深刻的能量密度。此外，由于圆柱形颗粒的表面积大、碳含量高，因此它具有较低的Rp∼0.8 Ω和Rs∼0.2 Ω电阻。此外，它还表现出出色的保留率（1 A g−1 下 4500 次循环后为 94.5%）。最后，这项研究展示了先进的 MOF 衍生材料的新颖性，为储能装置和超级电容器应用的电化学性能提供了一种有效的电极材料。