Fabrication of Ni-foam-assisted graphene@MnO2-doped carbon fabric electrodes from waste cotton fabrics for supercapacitors

IF 2.2 4区化学 Q2 Engineering

Chemical Papers Pub Date : 2024-10-22 DOI:10.1007/s11696-024-03733-7

Safa Polat, Tuğçe Rumeysa Karakaş

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引用次数: 0

Abstract

This study aims to enhance the energy storage capabilities of flexible supercapacitors by fabricating graphene-doped MnO₂-coated carbon cloth electrodes through a hydrothermal method. This technique was selected for its ability to uniformly disperse MnO₂ nanorods (~ 50 nm thick) on carbon surfaces, while anchoring graphene plates at rod interfaces to improve conductivity. Comprehensive characterization including XRD, FTIR, SEM, and TEM confirmed the structural integrity of the electrodes. Electrochemical analysis (CV, GCD, and EIS) revealed a diffusion-controlled charge storage mechanism, achieving a specific capacitance of 513 F/g (205 F/cm³–1027 mF/cm²) at a current density of 1 A/g. The electrodes demonstrated impressive energy-power densities of 45.6 Wh/kg–200 W/kg and retained 87% of their initial capacity after 2500 cycles, indicating robust cyclic stability. Remarkably, the inclusion of graphene enhanced the performance nearly threefold compared to similar electrodes in the literature, making these materials highly promising candidates for next-generation supercapacitors.

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利用废棉织物制备用于超级电容器的镍泡沫辅助石墨烯@MnO2掺杂碳织物电极

本研究旨在通过水热法制造石墨烯掺杂的 MnO₂涂层碳布电极，从而提高柔性超级电容器的储能能力。之所以选择这种技术，是因为它能够在碳表面均匀分散 MnO₂纳米棒（约 50 纳米厚），同时在棒接口处锚定石墨烯板以提高导电性。包括 XRD、FTIR、SEM 和 TEM 在内的综合表征证实了电极结构的完整性。电化学分析（CV、GCD 和 EIS）显示了一种扩散控制的电荷存储机制，在电流密度为 1 A/g 时，比电容达到 513 F/g（205 F/cm3-1027 mF/cm2）。这些电极的能量功率密度达到了令人印象深刻的 45.6 Wh/kg-200 W/kg，并且在循环 2500 次后仍保持了 87% 的初始容量，显示出强大的循环稳定性。值得注意的是，与文献中的类似电极相比，石墨烯的加入提高了近三倍的性能，使这些材料极有希望成为下一代超级电容器的候选材料。

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来源期刊

Chemical Papers Chemical Engineering-General Chemical Engineering

CiteScore

3.30

自引率

4.50%

发文量

590

期刊介绍： Chemical Papers is a peer-reviewed, international journal devoted to basic and applied chemical research. It has a broad scope covering the chemical sciences, but favors interdisciplinary research and studies that bring chemistry together with other disciplines.