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Electrochemical Energy Storage: Questioning the Popular v/v1/2 Scan Rate Diagnosis in Cyclic Voltammetry
The Journal of Physical Chemistry Letters ( IF 5.7 ) Pub Date : 2020-11-19 , DOI: 10.1021/acs.jpclett.0c02667
Cyrille Costentin 1, 2
Affiliation  

The v/v1/2 scan rate diagnosis in electrochemical energy storage devices is based on application of the relationship i = k1v + k2v1/2 (where k1 and k2 are two constants independent of the scan rate v) to the variation of the cyclic voltammetric responses with v. Several examples show that application of this scan rate diagnosis procedure leads to absurd results because the procedure is inappropriate under these conditions. It follows that the best approach is to simply forget about this v/v1/2 scan rate diagnosis, concentrate on the maximum number of experimental observations of the scan rate dependency, and build models able to reproduce these data in each case.

中文翻译:

电化学储能:对循环伏安法中流行的v / v 1/2扫描速率诊断提出质疑

电化学储能设备中的v / v 1/2扫描速率诊断基于以下关系式的应用:i = k 1 v + k 2 v 1/2(其中k 1k 2是两个常数,与扫描速率v无关))随v的循环伏安响应的变化。几个示例表明,此扫描速率诊断程序的应用导致荒谬的结果,因为该程序在这些条件下不适当。因此,最好的方法是简单地忽略此v/ v 1/2扫描速率诊断,专注于扫描速率相关性的最大实验观察数,并建立能够在每种情况下重现这些数据的模型。
更新日期:2020-11-19
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