Analysis of impedance spectroscopy of aqueous supercapacitors by evolutionary programming: Finding DFRT from complex capacitance

Alon Oz; Shany Hershkovitz; Nataly Belman; Ervin Tal-Gutelmacher; Yoed Tsur

doi:10.1016/j.ssi.2015.11.008

Analysis of impedance spectroscopy of aqueous supercapacitors by evolutionary programming: Finding DFRT from complex capacitance

Alon Oz, Shany Hershkovitz, Nataly Belman, Ervin Tal-Gutelmacher, Yoed Tsur

Research output: Contribution to journal › Article › peer-review

56 Scopus citations

Abstract

Electrochemical impedance spectroscopy (EIS) of aqueous-electrolyte supercapacitors can shed light on the physical processes occurring within the cell, given a proper analysis technique. Impedance Spectroscopy Genetic Programming (ISGP) is a novel technique to analyze EIS data. ISGP finds a functional form of the distribution of relaxation times utilizing genetic algorithm and offers a detailed quantitative analysis. In this work, EIS data of aqueous-electrolyte supercapacitors were analyzed by transforming the data to complex capacitance representation. A distribution function of relaxation times (DFRT) model was obtained, comprised of two peaks, each correlated with a different physical process (diffusion and EDLC formation). Two cell configurations were examined and the differences regarding capacitance distribution and diffusion rates are presented.

Original language	English
Pages (from-to)	311-314
Number of pages	4
Journal	Solid State Ionics
Volume	288
DOIs	https://doi.org/10.1016/j.ssi.2015.11.008
State	Published - 1 May 2016
Externally published	Yes

Keywords

Aqueous supercapacitors
Complex capacitance
Distribution of relaxation times
Impedance spectroscopy

ASJC Scopus subject areas

General Chemistry
General Materials Science
Condensed Matter Physics

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10.1016/j.ssi.2015.11.008

Cite this

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title = "Analysis of impedance spectroscopy of aqueous supercapacitors by evolutionary programming: Finding DFRT from complex capacitance",

abstract = "Electrochemical impedance spectroscopy (EIS) of aqueous-electrolyte supercapacitors can shed light on the physical processes occurring within the cell, given a proper analysis technique. Impedance Spectroscopy Genetic Programming (ISGP) is a novel technique to analyze EIS data. ISGP finds a functional form of the distribution of relaxation times utilizing genetic algorithm and offers a detailed quantitative analysis. In this work, EIS data of aqueous-electrolyte supercapacitors were analyzed by transforming the data to complex capacitance representation. A distribution function of relaxation times (DFRT) model was obtained, comprised of two peaks, each correlated with a different physical process (diffusion and EDLC formation). Two cell configurations were examined and the differences regarding capacitance distribution and diffusion rates are presented.",

keywords = "Aqueous supercapacitors, Complex capacitance, Distribution of relaxation times, Impedance spectroscopy",

author = "Alon Oz and Shany Hershkovitz and Nataly Belman and Ervin Tal-Gutelmacher and Yoed Tsur",

year = "2016",

month = may,

day = "1",

doi = "10.1016/j.ssi.2015.11.008",

language = "English",

volume = "288",

pages = "311--314",

journal = "Solid State Ionics",

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publisher = "Elsevier",

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TY - JOUR

T1 - Analysis of impedance spectroscopy of aqueous supercapacitors by evolutionary programming

T2 - Finding DFRT from complex capacitance

AU - Oz, Alon

AU - Hershkovitz, Shany

AU - Belman, Nataly

AU - Tal-Gutelmacher, Ervin

AU - Tsur, Yoed

PY - 2016/5/1

Y1 - 2016/5/1

N2 - Electrochemical impedance spectroscopy (EIS) of aqueous-electrolyte supercapacitors can shed light on the physical processes occurring within the cell, given a proper analysis technique. Impedance Spectroscopy Genetic Programming (ISGP) is a novel technique to analyze EIS data. ISGP finds a functional form of the distribution of relaxation times utilizing genetic algorithm and offers a detailed quantitative analysis. In this work, EIS data of aqueous-electrolyte supercapacitors were analyzed by transforming the data to complex capacitance representation. A distribution function of relaxation times (DFRT) model was obtained, comprised of two peaks, each correlated with a different physical process (diffusion and EDLC formation). Two cell configurations were examined and the differences regarding capacitance distribution and diffusion rates are presented.

AB - Electrochemical impedance spectroscopy (EIS) of aqueous-electrolyte supercapacitors can shed light on the physical processes occurring within the cell, given a proper analysis technique. Impedance Spectroscopy Genetic Programming (ISGP) is a novel technique to analyze EIS data. ISGP finds a functional form of the distribution of relaxation times utilizing genetic algorithm and offers a detailed quantitative analysis. In this work, EIS data of aqueous-electrolyte supercapacitors were analyzed by transforming the data to complex capacitance representation. A distribution function of relaxation times (DFRT) model was obtained, comprised of two peaks, each correlated with a different physical process (diffusion and EDLC formation). Two cell configurations were examined and the differences regarding capacitance distribution and diffusion rates are presented.

KW - Aqueous supercapacitors

KW - Complex capacitance

KW - Distribution of relaxation times

KW - Impedance spectroscopy

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U2 - 10.1016/j.ssi.2015.11.008

DO - 10.1016/j.ssi.2015.11.008

M3 - Article

AN - SCOPUS:84964671324

SN - 0167-2738

VL - 288

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EP - 314

JO - Solid State Ionics

JF - Solid State Ionics

ER -

Analysis of impedance spectroscopy of aqueous supercapacitors by evolutionary programming: Finding DFRT from complex capacitance

Abstract

Keywords

ASJC Scopus subject areas

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