三维碳纤维支撑的中空硫化铜球的纳米结构设计及其在非对称超级电容器中的应用。

Nanoarchitectonics of Three-Dimensional Carbon Nanofiber-Supported Hollow Copper Sulfide Spheres for Asymmetric Supercapacitor Applications.

机构信息

Department of Energy Storage, Conversion Engineering of Graduate School, Jeonbuk National University, Jeonju 54896, Republic of Korea.

Division of Convergence Technology Engineering, Jeonbuk National University, Jeonju 54896, Republic of Korea.

出版信息

Int J Mol Sci. 2023 Jun 2;24(11):9685. doi: 10.3390/ijms24119685.

Three-dimensional carbon nanofiber (3D-CNF)-supported hollow copper sulfide (HCuS) spheres were synthesized by the facile hydrothermal method. The morphology of the as-synthesized HCuS@3D-CNF composite clearly revealed that the 3D-CNFs act as a basement for HCuS spheres. The electrochemical performance of as-synthesized HCuS@3D-CNFs was evaluated by cyclic voltammetry (CV) tests, gravimetric charge-discharge (GCD) tests, and Nyquist plots. The obtained results revealed that the HCuS@3D-CNFs exhibited greater areal capacitance (4.6 F/cm) compared to bare HCuS (0.64 F/cm) at a current density of 2 mA/cm. Furthermore, HCuS@3D-CNFs retained excellent cyclic stability of 83.2% after 5000 cycles. The assembled asymmetric device (HCuS@3D-CNFs//BAC) exhibits an energy density of 0.15 mWh/cm with a working potential window of 1.5 V in KOH electrolyte. The obtained results demonstrate that HZnS@3D-CNF nanoarchitectonics is a potential electrode material for supercapacitor applications.

采用简便的水热法合成了三维碳纳米纤维（3D-CNF）支撑的空心硫化铜（HCuS）球。所合成的 HCuS@3D-CNF 复合材料的形态清楚地表明，3D-CNF 作为 HCuS 球的基底。通过循环伏安法（CV）测试、重量法充放电（GCD）测试和奈奎斯特图评估了所合成的 HCuS@3D-CNF 的电化学性能。得到的结果表明，在电流密度为 2 mA/cm 时，与裸 HCuS（0.64 F/cm）相比，HCuS@3D-CNF 的比面积电容（4.6 F/cm）更大。此外，HCuS@3D-CNF 在 5000 次循环后仍保持优异的循环稳定性，保持率为 83.2%。组装的非对称器件（HCuS@3D-CNFs//BAC）在 KOH 电解质中具有 1.5 V 的工作电位窗口，能量密度为 0.15 mWh/cm。结果表明，HCuS@3D-CNF 纳米结构是超级电容器应用的一种有前途的电极材料。