MoS2 介导的 CuCo2S4–MoS2 纳米复合材料的调谐，用于高性能对称混合超级电容器,Journal of Materials Chemistry C

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MoS2 介导的 CuCo2S4–MoS2 纳米复合材料的调谐，用于高性能对称混合超级电容器
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2023-11-10 , DOI: 10.1039/d3tc03403h
Mohasin Tarek ₁ , M. A. Basith ₁

Affiliation

在这项研究中，合成了二硫化钼（MoS ₂）纳米片、硫化铜钴（CuCo ₂ S ₄）纳米材料和MoS ₂掺入的CuCo ₂ S ₄ –MoS ₂纳米复合材料作为混合超级电容器的电极材料。为了合成CuCo ₂ S ₄ –MoS ₂纳米复合材料，改变并优化了MoS ₂的浓度，以提高其电化学性能，用于高性能储能装置。粉末XRD分析、TEM成像和X射线光电子能谱分析证实了CuCo ₂ S ₄ –MoS ₂纳米复合材料的成功形成。在三电极系统中，与其他合成电极材料相比， MoS ₂浓度为 20 wt% 的CuCo ₂ S ₄ –MoS ₂ (80 : 20) 纳米复合材料在 1 时表现出最高的比电容为 1333 F g ^-1 。 5000 次充放电循环后，电流密度为g ^{−1 ，电容保持率为 94%。}值得注意的是，在对称双电极配置中，优化的CuCo ₂ S ₄ –MoS ₂ (80 : 20)纳米复合材料在1 A g ^-1电流密度下也表现出最高的比电容670 F g ^-1，并实现了能量密度与其他合成电极材料相比，功率密度为 600 W kg ^-1时为 33.5 W h kg ^{-1 。}最后，利用优化的 CuCo ₂ S ₄ –MoS ₂ (80 : 20) 纳米复合材料作为电极材料，通过纽扣电池组装出原型超级电容器来点亮 LED。我们的研究结果表明，MoS ₂的加入提高了电化学性能，20 wt% MoS _{2是显着增强 CuCo}₂ S ₄的电荷存储容量、电导率和稳定性的最佳浓度。全面讨论了优化后的纳米复合材料在对称二电极系统中的电荷存储机制。本研究的结果表明，优化后的 CuCo ₂ S ₄ –MoS ₂(80:20)纳米复合材料具有高电荷存储容量、能量密度和优异的长期稳定性，可作为高性能对称混合超级电容器的高效电极材料。

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MoS2 mediated tuning of CuCo2S4–MoS2 nanocomposites for high-performance symmetric hybrid supercapacitors

In this investigation, molybdenum disulfide (MoS₂) nanosheets, copper cobalt sulfide (CuCo₂S₄) nanomaterials, and MoS₂ incorporated CuCo₂S₄–MoS₂ nanocomposites were synthesized as electrode materials for hybrid supercapacitors. The concentrations of MoS₂ were varied and optimized for the synthesis of CuCo₂S₄–MoS₂ nanocomposites to improve their electrochemical properties for use in high-performance energy storage devices. The successful formation of CuCo₂S₄–MoS₂ nanocomposites was confirmed by powder XRD analysis, TEM imaging and X-ray photoelectron spectroscopy analyses. In a three-electrode system, compared to other synthesized electrode materials, the CuCo₂S₄–MoS₂ (80 : 20) nanocomposite with a 20 wt% concentration of MoS₂ demonstrated the highest specific capacitance of 1333 F g⁻¹ at 1 A g⁻¹ current density and 94% capacitance retention after 5000 charge–discharge cycles. Notably, in a symmetric two-electrode configuration, the optimized CuCo₂S₄–MoS₂ (80 : 20) nanocomposite also exhibited the highest specific capacitance of 670 F g⁻¹ at 1 A g⁻¹ current density and achieved an energy density of 33.5 W h kg⁻¹ at 600 W kg⁻¹ power density compared to that of other synthesized electrode materials. Finally, a prototype supercapacitor was assembled by utilizing the optimized CuCo₂S₄–MoS₂ (80 : 20) nanocomposite as an electrode material via a coin cell to light up an LED. Our findings demonstrate that incorporation of MoS₂ improves electrochemical performance and 20 wt% MoS₂ is the optimum concentration to significantly enhance the charge storage capacity, conductivity, and stability of CuCo₂S₄. The charge storage mechanism of the optimized nanocomposite in a symmetric two-electrode system was comprehensively discussed. The outcome of this investigation demonstrated that the optimized CuCo₂S₄–MoS₂ (80 : 20) nanocomposite with its high charge storage capacity, energy density, and excellent long-term stability can be used as an efficient electrode material for high-performance symmetric hybrid supercapacitors.

更新日期：2023-11-10

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