Modeling of charging dynamics in electrochemical systems with a graphene electrode

IF 4.5 3区化学 Q1 Chemical Engineering Journal of Electroanalytical Chemistry Pub Date : 2023-08-10 DOI:10.1016/j.jelechem.2023.117711

Mahdi Yavarian , Roderick Melnik , Z.L. Mišković

引用次数: 0

Abstract

A classical electrochemistry problem related to the polarization of a graphene electrode immersed in an aqueous solution and subjected to a small external ac voltage is revisited. The Poisson-Nernst-Planck equations with proper boundary conditions are linearized and normalized, leading to an analytical formula for the impedance of the electrochemical system containing a graphene-metal electrode pair. Electrochemical impedance spectroscopy is utilized to compare the impedance behavior of the graphene-metal electrode pair with the standard metal-metal electrode pair for a range of ion concentrations in the electrolyte. Also studied is the electrochemical capacitive spectroscopy to provide a detailed analysis related to the effects of the quantum capacitance of graphene on the total capacitive properties of the system.

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石墨烯电极电化学系统的充电动力学建模

一个经典的电化学问题有关的极化石墨烯电极浸在水溶液中，并受到一个小的外部交流电压被重新审视。对具有适当边界条件的泊松-能思-普朗克方程进行了线性化和归一化处理，得到了含石墨烯-金属电极对的电化学系统阻抗的解析公式。电化学阻抗谱用于比较石墨烯-金属电极对与标准金属-金属电极对在电解质中离子浓度范围内的阻抗行为。还研究了电化学电容光谱，详细分析了石墨烯量子电容对系统总电容性能的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Electroanalytical Chemistry Chemical Engineering-General Chemical Engineering

CiteScore

7.50

自引率

6.70%

发文量

912

审稿时长

>12 weeks

期刊介绍： The Journal of Electroanalytical Chemistry is the foremost international journal devoted to the interdisciplinary subject of electrochemistry in all its aspects, theoretical as well as applied. Electrochemistry is a wide ranging area that is in a state of continuous evolution. Rather than compiling a long list of topics covered by the Journal, the editors would like to draw particular attention to the key issues of novelty, topicality and quality. Papers should present new and interesting electrochemical science in a way that is accessible to the reader. The presentation and discussion should be at a level that is consistent with the international status of the Journal. Reports describing the application of well-established techniques to problems that are essentially technical will not be accepted. Similarly, papers that report observations but fail to provide adequate interpretation will be rejected by the Editors. Papers dealing with technical electrochemistry should be submitted to other specialist journals unless the authors can show that their work provides substantially new insights into electrochemical processes.