恒相元件
介电谱
电容
超级电容器
循环伏安法
电阻抗
材料科学
电化学
电容器
相(物质)
电极
常量(计算机编程)
分析化学(期刊)
化学
计算机科学
电气工程
电压
色谱法
工程类
物理化学
有机化学
程序设计语言
作者
Samantha Michelle Gateman,Oumaïma Gharbi,Hercílio Gomes de Melo,Kieu Ngo,Mireille Turmine,Vincent Vivier
标识
DOI:10.1016/j.coelec.2022.101133
摘要
Several techniques can be used to experimentally determine the interfacial capacitance of an electrode, which is a crucial parameter used for quantifying the efficiency of supercapacitors. However, the values obtained from cyclic voltammetry can be significantly different from those extracted from electrochemical impedance spectroscopy analysis. This is particularly due to the fact that the interface does not behave like an ideal (i.e., frequency independent) capacitor, and requires the adoption of a constant phase element (CPE). In this article, we present the state of the art on this apparent difference and on the error that can result from one or the other technique using CPE analysis.
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