电化学双层电容 可以由两种方法获得：（1）测量不同扫速下的 循环伏安曲线 对应的非法拉第区间双电层电容电流，线性拟合后计算得到。 （2）利用 电化学阻抗谱，测量在不同频率下对应的阻抗计算获得。 前一种方法由于过程相对较简单，因此电化学活性面积往往根据催化表面的电化学双层电容（Double-layercapacitance，Cdl）估算得到。 . 采用双层电容法时，一般在未发生氧化还原反应的区间进行循环伏安测试。 并且以开路电压为中心电位，取大约50 mV或者100 mV的电位 …

To calculate the double-layer capacitance (C_dl) from cyclic voltammetry (CV) data taken at different scan rates, you'll need to follow these steps: Obtain CV data at multiple scan rates: Perform...

2023年4月1日 · ECSA values of a catalyst are directly related to the double-layer capacitance (C dl) value of the catalyst. Here in this report, we have highlighted the effective ways of calculating C dl values for the determination specific OER activity in detail.

2021年6月23日 · Herein, we propose a seven-step method that aims to determine CDL reliably by scan rate-dependent cyclic voltammetry considering aspects that strongly influence the outcome of the analysis, including (a) selection of a suitable measuring window, (b) the uncompensated resistance, (c) optimization of measuring settings, (d) data acquisition, (e ...

For performing scan rate test, you should concentrate on double layer region potential window. You don't need to apply whole potential range. I will recommend you to refer this article for better...

2021年7月23日 · For the interpretation of the response, constant phase elements (CPEs) are used in the frequency domain based impedance calculus to parameterize the double layer. In this study, the double layer responses to the two measurement techniques are compared by probing a model-type polished gold electrode under potential and amplitude variation.

2012年3月1日 · This study established that the hump in CV curves for electrodes with large radius of curvature was due to the saturation of ion concentration near the electrode surface before reaching the maximum potential. It also demonstrates that CV curves became symmetric for large ion diffusion coefficient due to rapid ion transport.

Download scientific diagram | Cyclic voltammetry curves for Cdl measurements a S1,c S2, c S3 and capacitive current at different scan rate at 1.1 V for b S1, d S2,f S3 from publication:...

2014年2月21日 · Experimental electrical double-layer capacitances of porous carbon electrodes fall below ideal values, thus limiting the practical energy densities of carbon-based electrical double-layer...

2016年12月9日 · The integral capacitance C of the target electrode can be calculated from the CV curves as 18: