基于氧化镍的核壳纳米复合材料与高性能超级电容器电极材料的比较研究

IF 2.9 3区物理与天体物理 Q3 NANOSCIENCE & NANOTECHNOLOGY

Physica E-low-dimensional Systems & Nanostructures Pub Date : 2024-10-11 DOI:10.1016/j.physe.2024.116121

Jhalak Gupta , Arham S. Ahmed , Pushpendra , Ameer Azam

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引用次数: 0

摘要

在这项研究工作中，我们采用溶胶-凝胶法制备了 NiO@SnO2（N1）、NiO@ZnO（N2）和 NiO@MnO2（N3）核壳纳米复合材料。利用各种表征技术对制备的样品进行了不同性质的研究。透射电子显微镜、X 射线光电子能谱、傅立叶变换红外光谱和 X 射线衍射分析对纳米复合材料的形貌和结构进行了表征。此外，还利用紫外可见光谱和光致发光光谱分析了纳米复合材料的光学特性。此外，还通过循环伏安图（CV）、电静态充放电（GCD）和电化学阻抗谱（EIS）对超级电容器性能进行了检测。电化学结果表明，所有制备的复合材料都表现出良好的电化学性能，但其中 N2 的电化学性能更优。在 1 A g-1 的条件下，N2 的比电容为 720 F/g，循环稳定性极佳（在 1 A g-1 条件下循环 6000 次后，电容保持率为 96.5%）。因此，这种炒锅为超级电容器的未来应用提供了有意义的参考。

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Comparative study of NiO based core-shell nanocomposites to high performance supercapacitor electrode materials

In this research work, we prepared NiO@SnO₂ (N1), NiO@ZnO (N2) and NiO@MnO₂ (N3) core-shell nanocomposites using sol-gel route. Prepared samples were investigated for their different properties employing various characterization techniques. The morphology and structure of the nanocomposites were characterized by transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform Infrared Spectroscopy, X-ray diffraction analysis. Furthermore, the optical properties were analyzed using UV–Vis Spectroscopy, Photoluminescence Spectroscopy. In addition, the supercapacitive performances were examined by cyclic voltammogram (CV), galvanostatic charge-discharge(GCD) and electrochemical impedance spectroscopy (EIS). The electrochemical results indicate that all the prepared composites exhibits good electrochemical performance but N2 depicts superior results among all. The specific capacitance obtained for N2 is 720 F/g at 1 A g⁻¹ and excellent cycling stability (96.5 % retention after 6000 cycles at 1 A g⁻¹). Therefore, this wok offers meaningful reference for supercapacitor applications in the future.

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来源期刊

Physica E-low-dimensional Systems & Nanostructures 物理-纳米科技

CiteScore

7.30

自引率

6.10%

发文量

356

审稿时长

65 days

期刊介绍： Physica E: Low-dimensional systems and nanostructures contains papers and invited review articles on the fundamental and applied aspects of physics in low-dimensional electron systems, in semiconductor heterostructures, oxide interfaces, quantum wells and superlattices, quantum wires and dots, novel quantum states of matter such as topological insulators, and Weyl semimetals. Both theoretical and experimental contributions are invited. Topics suitable for publication in this journal include spin related phenomena, optical and transport properties, many-body effects, integer and fractional quantum Hall effects, quantum spin Hall effect, single electron effects and devices, Majorana fermions, and other novel phenomena. Keywords: • topological insulators/superconductors, majorana fermions, Wyel semimetals; • quantum and neuromorphic computing/quantum information physics and devices based on low dimensional systems; • layered superconductivity, low dimensional systems with superconducting proximity effect; • 2D materials such as transition metal dichalcogenides; • oxide heterostructures including ZnO, SrTiO3 etc; • carbon nanostructures (graphene, carbon nanotubes, diamond NV center, etc.) • quantum wells and superlattices; • quantum Hall effect, quantum spin Hall effect, quantum anomalous Hall effect; • optical- and phonons-related phenomena; • magnetic-semiconductor structures; • charge/spin-, magnon-, skyrmion-, Cooper pair- and majorana fermion- transport and tunneling; • ultra-fast nonlinear optical phenomena; • novel devices and applications (such as high performance sensor, solar cell, etc); • novel growth and fabrication techniques for nanostructures