Electrochemical investigation of Al2O3-CuO binary nanocomposite electrodes: Towards high energy storage supercapacitors

IF 5.8 2区材料科学 Q2 CHEMISTRY, PHYSICAL

Journal of Alloys and Compounds Pub Date : 2025-05-06 DOI:10.1016/j.jallcom.2025.180806

Devaki U. Asangi , Bipin S. Chikkatti , Ashok M. Sajjan , Nagaraj R. Banapurmath , T.M. Yunus Khan , Syed Waheedullah Ghori , Shivashankar A. Huddar , S.K. Rajappa

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Abstract

The escalating demand for sustainable energy solutions necessitates advanced energy storage systems. This study explores the development and performance of Al₂O₃/CuO binary nanocomposites as next-generation electrode materials for supercapacitors. Comprehensive material characterizations, including FTIR, XRD, SEM and EDS analyses, confirm the successful integration of Al₂O₃ and CuO, yielding a high surface area. Al₂O₃/CuO composite is subjected to CV, EIS and GCD. CV highlights enhance EDLC behavior and excellent rate capability, while GCD studies demonstrate extended energy and power densities with minimal resistance. The composite retains 85 % of its initial capacitance after 5000 cycles, underscoring exceptional durability and stability. Electrochemical evaluations reveal the Al₂O₃/CuO nanocomposite achieves a superior specific capacitance of 864 F g⁻¹ at 1.0 A g⁻¹, far exceeding individual components. EIS further confirms improved charge transfer kinetics and ion diffusion efficiency, driven by the synergistic interplay between Al₂O₃ and CuO. This study underscores the significance of material engineering in unlocking the full potential of binary nanostructures for sustainable energy solutions.

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Al2O3-CuO二元纳米复合电极的电化学研究：面向高能量存储超级电容器

对可持续能源解决方案不断增长的需求需要先进的储能系统。本研究探讨了Al₂O₃/CuO二元纳米复合材料作为下一代超级电容器电极材料的开发和性能。全面的材料表征，包括FTIR， XRD， SEM和EDS分析，证实了Al₂O₃和CuO的成功结合，产生了高表面积。Al₂O₃/CuO复合材料受到CV、EIS和GCD的影响。CV突出了EDLC的行为和出色的速率能力，而GCD研究表明，在最小电阻的情况下，扩展了能量和功率密度。在5000次循环后，复合材料保持了85%的初始电容，强调了卓越的耐用性和稳定性。电化学评价表明，Al₂O₃/CuO纳米复合材料在1.0 a g-1时的比电容达到864 F g⁻¹，远远超过单个成分。EIS进一步证实了Al₂O₃和CuO之间的协同作用提高了电荷转移动力学和离子扩散效率。这项研究强调了材料工程在释放二元纳米结构作为可持续能源解决方案的全部潜力方面的重要性。

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来源期刊

Journal of Alloys and Compounds 工程技术-材料科学：综合

CiteScore

11.10

自引率

14.50%

发文量

5146

审稿时长

67 days

期刊介绍： The Journal of Alloys and Compounds is intended to serve as an international medium for the publication of work on solid materials comprising compounds as well as alloys. Its great strength lies in the diversity of discipline which it encompasses, drawing together results from materials science, solid-state chemistry and physics.