Thiol-functionalized CeO2 in PPy-CeO2 nanocomposites with improved electrochemical performance for supercapacitor applications

IF 1.6 4区工程技术 Q4 POLYMER SCIENCE

International Journal of Polymer Analysis and Characterization Pub Date : 2026-02-17 Epub Date: 2025-09-03 DOI:10.1080/1023666X.2025.2548335

Darshana Upadye Beelagi , R. M. Hodlur , Shivakumar. Mathapati , J. S. Doddamani

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Abstract

Conducting polymer-metal oxide nanocomposites hold considerable promise for advanced supercapacitor electrodes. In this study, thiol-functionalized CeO₂ nanoparticles were integrated into a polypyrrole (PPy) matrix using graphite oxide (GO) as a binder to improve dispersion and interfacial interaction. The nanocomposites were uniformly deposited on a glassy carbon electrode (GCE) and scrupulously characterized. Among various formulations, the optimized PPy: GO: CeO₂ ration of 70:10:20 delivered the best electrochemical performance. Structural and interfacial features were confirmed from XRD, FTIR, TEM, and TGA analyses. The optimized composite exhibited a high specific capacitance of 530 F/g at 5 mV/s, along with exceptional cyclic stability, retaining 96.84% of its capacitance after 1000 cycles, and delivered ∼ 105% Coulombic efficiency at 10 A/g. Thus, anchoring CeO₂ nanostructures into the PPy matrix enhanced both charge storage and thermal stability, highlighting its prospect as a high-performance electrode material for next-generation supercapacitors.

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巯基化CeO2的PPy-CeO2纳米复合材料在超级电容器中的应用改善了电化学性能

导电聚合物金属氧化物纳米复合材料在先进的超级电容器电极中具有相当大的前景。在这项研究中，硫醇功能化的CeO2纳米颗粒被集成到聚吡咯（PPy）基体中，使用氧化石墨（GO）作为粘合剂来改善分散和界面相互作用。纳米复合材料均匀沉积在玻碳电极（GCE）上，并进行了严格的表征。在各种配方中，优化后的PPy: GO: CeO2比为70:10:20的电化学性能最佳。通过XRD， FTIR， TEM和TGA分析确定了其结构和界面特征。优化后的复合材料在5 mV/s下具有530 F/g的高比电容，以及出色的循环稳定性，在1000次循环后保持96.84%的电容，并在10 a /g下提供~ 105%的库仑效率。因此，将CeO2纳米结构锚定到PPy基体中可以增强电荷存储和热稳定性，突显其作为下一代超级电容器高性能电极材料的前景。

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来源期刊

International Journal of Polymer Analysis and Characterization 化学-高分子科学

CiteScore

3.50

自引率

5.30%

发文量

审稿时长

1.6 months

期刊介绍： The scope of the journal is to publish original contributions and reviews on studies, methodologies, instrumentation, and applications involving the analysis and characterization of polymers and polymeric-based materials, including synthetic polymers, blends, composites, fibers, coatings, supramolecular structures, polysaccharides, and biopolymers. The Journal will accept papers and review articles on the following topics and research areas involving fundamental and applied studies of polymer analysis and characterization: Characterization and analysis of new and existing polymers and polymeric-based materials. Design and evaluation of analytical instrumentation and physical testing equipment. Determination of molecular weight, size, conformation, branching, cross-linking, chemical structure, and sequence distribution. Using separation, spectroscopic, and scattering techniques. Surface characterization of polymeric materials. Measurement of solution and bulk properties and behavior of polymers. Studies involving structure-property-processing relationships, and polymer aging. Analysis of oligomeric materials. Analysis of polymer additives and decomposition products.