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用于高性能超级电容器的石墨笔电极的受控电化学表面剥离

Ayman A AbdelHamid¹, Abdelaziz Elgamouz¹, Abdel-Nasser Kawde¹

¹Pure and Applied Chemistry Group, Department of Chemistry, College of Sciences, University of Sharjah P.O. Box 27272 Sharjah United Arab Emirates akawde@sharjah.ac.ae.

|July 17, 2023

概括

研究人员开发了一种环保的电化学方法,在笔电极上剥离石墨烯. 这一过程显著提高了超级电容器和其他应用中的电极表面积和性能.

科学领域:

材料科学材料科学材料科学
电化学电化学电化学
纳米技术纳米技术

背景情况:

石墨笔电极广泛使用,但在电化学性能方面存在局限性.
开发可扩展和具有成本效益的方法来提高电极表面性能对于先进的能量存储至关重要.

研究的目的:

报告对石墨笔电极的一种可控,环保和可扩展的电化学剥皮方法.
为了研究这种脱皮对电极性能和超级电容器性能的影响.

主要方法:

在中性介质中使用简单的直流电源来控制石墨烯的形成.
使用各种光谱和显微镜技术 (SEM,拉曼,XPS,XRD) 描述了剥落的石墨烯层.
评估了修改过的电极作为超级电容器的电化学性能.

主要成果:

实现了电化学表面积> 300 倍的增加和电极电阻> 50 倍的减少.
确认有表面缺陷和完整的石墨结构的石墨烯形成.
在超级电容性能方面,已经证明了超过2个数量级的改进,达到~54mF cm-2的面积电容.

结论:

开发的电化学脱皮方法是良性的,低成本的,可扩展的.
这种技术显著提高了电极的性能,显示了储能,传感器和催化剂的巨大前景.

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