Exploring the underlying kinetics of electrodeposited PANI-CNT composite using distribution of relaxation times

被引：2

作者：

Stott, Ash ^{[1
]}

Neto, Decio B. de Freitas ^{[2
]}

Rosolen, Jose M. ^{[2
]}

Sporea, Radu A. ^{[1
]}

Silva, S. Ravi P. ^{[1
]}

机构：

[1] Adv Technol Inst, Guildford GU2 7XH, Surrey, England

[2] 1 Univ Sao Paulo, Fac Filosofia Cien Cias & Letras Ribeirao Preto, Dept Quim, Ave Bandeirantes 3900, BR-14040901 Ribeirao Preto, SP, Brazil

来源：

ELECTROCHIMICA ACTA | 2022年 / 401卷

基金：

巴西圣保罗研究基金会; 英国工程与自然科学研究理事会;

关键词：

Supercapactior; Electrochemistry; Electrodeposition; Electrochemical impedance; Electrochemical characterization; ELECTROCHEMICAL IMPEDANCE SPECTROSCOPY; CARBON NANOTUBE; ELECTRICAL-PROPERTIES; ENERGY-STORAGE; POLYANILINE; ELECTROPOLYMERIZATION; REGULARIZATION; DECONVOLUTION; PERFORMANCE; NUCLEATION;

D O I：

10.1016/j.electacta.2021.139501

中图分类号：

O646 [电化学、电解、磁化学];

学科分类号：

081704 ;

摘要：

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 quanti-fied 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 without a priori knowledge 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 F g - 1 and rate capability of 76% from 1 to 100 mV s - 1 . (c) 2021 Elsevier Ltd. All rights reserved.

引用

页数：8

共 59 条

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