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

Oz, Alon; Hershkovitz, Shany; Belman, Nataly; Tal-Gutelmacher, E.; Tsur, Yoed

doi:10.1016/j.ssi.2015.11.008

Cited by 60 publications

(34 citation statements)

References 17 publications

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“…Several different ECs can result in the same spectrum, leading to completely different physical interpretations (Baltianski and Tsur 2003). Thus, other modern analysis techniques, notably Impedance Spectroscopy Genetic Programming (ISGP) (Hershkovitz et al 2011, Hershkovitz et al 2012, Drach et al 2016, Oz et al 2016, Oz et al 2017, analyzing distribution of relaxation times in the system, and mechanistic models (Amphlett et al 1995, Springer et al 1996, Franco et al 2007, Reshetenko and Kulikovsky 2017, are being also employed.…”

Section: Characterization Of Pem Transport Properties 41 In Situ Pemmentioning

confidence: 99%

Understanding methods of preparation and characterization of pore-filling polymer composites for proton exchange membranes: a beginner’s guide

Gloukhovski

Freger

Tsur

2017

Reviews in Chemical Engineering

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Abstract Composite membranes based on porous support membranes filled with a proton-conducting polymer appear to be a promising approach to develop novel proton exchange membranes (PEMs). It allows optimization of the properties of the filler and the matrix separately, e.g. for maximal conductivity of the former and maximal physical strength of the latter. In addition, the confinement itself can alter the properties of the filling ionomer, e.g. toward higher conductivity and selectivity due to alignment and restricted swelling. This article reviews the literature on PEMs prepared by filling of submicron and nanometric size pores with Nafion and other proton-conductive polymers. PEMs based on alternating perfluorinated and non-perfluorinated polymer systems and incorporation of fillers are briefly discussed too, as they share some structure/transport relationships with the pore-filling PEMs. We also review here the background knowledge on structural and transport properties of Nafion and proton-conducting polymers in general, as well as experimental methods concerned with preparation and characterization of pore-filling membranes. Such information will be useful for preparing next-generation composite membranes, which will allow maximal utilization of beneficial characteristics of polymeric proton conductors and understanding the complicated structure/transport relationships in the pore-filling composite PEMs.

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Section: Characterization Of Pem Transport Properties 41 In Situ Pemmentioning

confidence: 99%

Understanding methods of preparation and characterization of pore-filling polymer composites for proton exchange membranes: a beginner’s guide

Gloukhovski

Freger

Tsur

2017

Reviews in Chemical Engineering

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“…The physical parameters (resistance, reactance/capacitance and central relaxation time constant for each peak) can be determined very accurately. This analytical method has many advantages over the conventional equivalent circuit method [54,63–70] . For example, in cases where the Nyquist plots contain highly overlapping semicircles, the DFRT peaks obtained by ISGP fitting are separated well and the corresponding physical parameters are evaluated accurately [54,63–70] …”

Section: Methodsmentioning

confidence: 99%

Tri‐Functional Double Perovskite Oxide Catalysts for Fuel Cells and Electrolyzers

et al. 2020

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Perovskite oxides are at the forefront of the race to develop catalysts/electrodes for fuel cells and electrolyzers. This work presents trifunctional properties of the double‐perovskite oxide PrBa0.5Sr0.5Co1.5Fe0.5O5+δ and the PrBa0.5Sr0.5Co1.5Fe0.5O5+δ−Ag composite prepared by the glycine nitrate process. The electrocatalytic studies reveal that the Ag‐based composite is an excellent catalyst for both oxygen evolution (OER) and hydrogen evolution reactions (HER) in alkaline solution. The electrochemical impedance spectroscopy analysis through distribution function of relaxation times (DFRT) suggests that the improved activity originates from the suppression of resistance contributed by various relaxation processes. The oxygen reduction reaction (ORR) kinetics in these oxide‐based cathodes has been studied by performing symmetric‐cell measurements at high temperatures using both oxygen‐ion and proton‐conducting cells. DC bias dependence of charge‐transfer processes, oxygen‐surface kinetics, polarization resistances, and activation energies are revealed by DFRT studies. Ag addition in PrBa0.5Sr0.5Co1.5Fe0.5O5+δ leads to enhanced kinetics of OER, HER, and ORR.

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“…Electrochemical impedance spectroscopy (EIS) has been proven to be a powerful tool for the diagnosis of complex electrochemical systems, including lithium-ion batteries [1][2][3][4][5][6], fuel cells [7,8], and supercapacitors [9,10]. Electrochemical impedance spectroscopy has been widely used to characterize the polarization processes of lithium-ion batteries [11][12][13][14] and to investigate various prognostics and health management (PHM) methods [15][16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Determination of the Differential Capacity of Lithium-Ion Batteries by the Deconvolution of Electrochemical Impedance Spectra

Guo

Yang

Guo³

et al. 2020

Energies

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Electrochemical impedance spectroscopy (EIS) is a powerful tool for investigating electrochemical systems, such as lithium-ion batteries or fuel cells, given its high frequency resolution. The distribution of relaxation times (DRT) method offers a model-free approach for a deeper understanding of EIS data. However, in lithium-ion batteries, the differential capacity caused by diffusion processes is non-negligible and cannot be decomposed by the DRT method, which limits the applicability of the DRT method to lithium-ion batteries. In this study, a joint estimation method with Tikhonov regularization is proposed to estimate the differential capacity and the DRT simultaneously. Moreover, the equivalence of the differential capacity and the incremental capacity is proven. Different types of commercial lithium-ion batteries are tested to validate the joint estimation method and to verify the equivalence. The differential capacity is shown to be a promising approach to the evaluation of the state-of-health (SOH) of lithium-ion batteries based on its equivalence with the incremental capacity.

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

Cited by 60 publications

References 17 publications

Understanding methods of preparation and characterization of pore-filling polymer composites for proton exchange membranes: a beginner’s guide

Understanding methods of preparation and characterization of pore-filling polymer composites for proton exchange membranes: a beginner’s guide

Tri‐Functional Double Perovskite Oxide Catalysts for Fuel Cells and Electrolyzers

Determination of the Differential Capacity of Lithium-Ion Batteries by the Deconvolution of Electrochemical Impedance Spectra

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