Exploring the underlying kinetics of electrodeposited PANI-CNT composite using distribution of relaxation times
Exploring the underlying kinetics of electrodeposited PANI-CNT composite using distribution of relaxation times
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DOI：
10.1016/j.electacta.2021.139501
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发表时间：
2021-10
影响因子：
6.6
通讯作者：
Ash Stott;D.B. de Freitas Neto;J. M. Rosolen;R. Sporea;S. R. Silva
中科院分区：
文献类型：
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作者：
Ash Stott;D.B. de Freitas Neto;J. M. Rosolen;R. Sporea;S. R. Silva
通过分析一系列参数化的复合聚苯胺 (PANI) 涂覆的碳纳米管 (CNT) 电极的阻抗谱，成功证明了弛豫时间 (DRT) 的分布。然后将 DRT 应用于测量的光谱，并根据典型时间常数分离偏振过程。通过分析一组在不同条件下沉积聚苯胺的电极，形成一组参数，确定了主要过程，并量化了它们的贡献。我们首次证明 DRT 可用于识别复杂复合电极的各个内部过程，而无需先了解系统。该方法为 EIS 谱的研究和阻容系统的表征提供了一种无模型方法。我们的 PANI 涂层 CNT 电极的优化证明了这一点，该电极表现出 772 Fg−1 的 PANI 比电容和 1 至 100 mVs−1 范围内 76% 的倍率能力。
The Distribution of Relaxation Times (DRT) was successfully demonstrated in the analysis of the impedance spectra of a parametric series of composite polyaniline (PANI) coated carbon nanotubes (CNT) electrodes. DRT was then applied to the measured spectra and polarization processes were separated based on their typical time constants. The main processes were identified, and their contribution quantified by analysing a set of electrodes with PANI deposited under various conditions, forming a parametric set. For the first time we have shown that DRT can be used to identify individual internal processes of complex composite electrodes withouta prioriknowledge of the system. This method offers a model-free approach for the study of EIS spectra and the characterization of resistive-capacitive systems. This was demonstrated by the optimisation of our PANI coated CNT electrodes which have exhibited a PANI specific capacitance of 772 Fg−1and rate capability of 76% from 1 to 100 mVs−1.