The Distribution Function of Differential Capacity as a new tool for analyzing the capacitive properties of Lithium-Ion batteries

Schönleber, Michael; Ivers-Tiffée, Ellen

doi:10.1016/j.elecom.2015.09.024

Cited by 33 publications

(19 citation statements)

References 14 publications

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“…Complex capacitance analysis has previously been utilized to investigate the capacitive characteristics of various energy materials. − Complex capacitance analysis is an effective tool for understanding the capacitive response at low frequency range, whereas the impedance spectra generally concentrate on the analysis of the resistive behavior at a higher frequency range. The real capacitance represents the ability of the system to store electrical energy and the imaginary capacitance indicates losses in the form of energy dissipation.…”

Section: Resultsmentioning

confidence: 99%

Complex Impedance Analysis on Charge Accumulation Step of Mn₃O₄ Nanoparticles during Water Oxidation

et al. 2021

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The development of efficient water-oxidizing electrocatalysts is a key issue for achieving high performance in the overall water electrolysis technique. However, the complexity of multiple electron transfer processes and large activation energies have been regarded as major bottlenecks for efficient water electrolysis. Thus, complete electrochemical processes, including electron transport, charge accumulation, and chemical bond formation/dissociation, need to be analyzed for establishing a design rule for film-type electrocatalysts. In light of this, complex capacitance analysis is an effective tool for investigating the charge accumulation and dissipation processes of film-type electrocatalysts. Here, we conduct complex capacitance analysis for the Mn 3 O 4 nanocatalyst, which exhibits superb catalytic activity for water oxidation under neutral conditions. Charge was accumulated on the catalyst surface by the change in Mn valence between Mn(II) and Mn(IV) prior to the rate-determining O−O bond forming step. Furthermore, we newly propose the dissipation ratio (D) for understanding the energy balance between charge accumulation and charge consumption for chemical O−O bond formation. From this analysis, we reveal the potential-and thickness-dependent contribution of the charge accumulation process on the overall catalytic efficiency. We think that an understanding of complex capacitance analysis could be an effective methodology for investigating the charge accumulation process on the surface of general film-type electrocatalysts.

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Section: Resultsmentioning

confidence: 99%

Complex Impedance Analysis on Charge Accumulation Step of Mn₃O₄ Nanoparticles during Water Oxidation

et al. 2021

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“…Fortunately, there have been two important extensions of the DRT methods. One approach pioneered by the Ivers-Tiffée and Tsur groups [80,81] consists in transforming the experimental in capacitive form by computing the complex capacitance as follows:…”

Section: Distribution Of Relaxation Diffusion and Capacitance Timesmentioning

confidence: 99%

Modeling electrochemical impedance spectroscopy

Ciucci

2019

Current Opinion in Electrochemistry

320

142

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“…Analogous to the other electrochemical systems, R Ω is the ohmic resistance mainly due to the ionic resistance of the electrolyte, and L is the inductivity of cabling. Equivalent to the battery's impedance spectrum, the diverging resistive-capacitive behavior at low frequencies results in an identifiable capacitance C. This variable has to be interpreted as a differential capacity dC Ah /dV of the impedance spectrum [41] and is not to be confused with the nominal capacitance C DLC of the double-layer capacitor measured via a full discharge. Five resistive-capacitive contributions were found in Figure 6c.…”

Section: Double Layer Capacitormentioning

confidence: 99%

Generalized Distribution of Relaxation Times Analysis for the Characterization of Impedance Spectra

Danzer

2019

Batteries

136

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Impedance spectroscopy is a universal nondestructive tool for the analysis of the polarization behavior of electrochemical systems in frequency domain. As an extension and enhancement of the standard impedance spectroscopy, the distribution of relaxation times (DRT) analysis was established, where the spectra are transferred from frequency into time domain. The DRT helps to analyze complex impedance spectra by identifying the number of polarization processes involved without prior assumptions and by separating and quantifying their single polarization contributions. The DRT analysis, as introduced in literature, claims to be a model-free approach for the characterization of resistive-capacitive systems. However, a data preprocessing step based on impedance models is often required to exclude non-resistive-capacitive components off the measured impedance spectra. The generalized distribution of relaxation times (GDRT) analysis presented in this work is dedicated to complex superposed impedance spectra that include ohmic, inductive, capacitive, resistive-capacitive, and resistive-inductive effects. The simplified work flow without preprocessing steps leads to a reliable and reproducible DRT analysis that fulfills the assumption of being model-free. The GDRT is applicable for the analysis of electrochemical, electrical, and even for non-electrical systems. Results are shown for a lithium-ion battery, a vanadium redox flow battery, and for a double-layer capacitor.

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The Distribution Function of Differential Capacity as a new tool for analyzing the capacitive properties of Lithium-Ion batteries

Cited by 33 publications

References 14 publications

Complex Impedance Analysis on Charge Accumulation Step of Mn₃O₄ Nanoparticles during Water Oxidation

Complex Impedance Analysis on Charge Accumulation Step of Mn₃O₄ Nanoparticles during Water Oxidation

Modeling electrochemical impedance spectroscopy

Generalized Distribution of Relaxation Times Analysis for the Characterization of Impedance Spectra

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The Distribution Function of Differential Capacity as a new tool for analyzing the capacitive properties of Lithium-Ion batteries

Cited by 33 publications

References 14 publications

Complex Impedance Analysis on Charge Accumulation Step of Mn3O4 Nanoparticles during Water Oxidation

Complex Impedance Analysis on Charge Accumulation Step of Mn3O4 Nanoparticles during Water Oxidation

Modeling electrochemical impedance spectroscopy

Generalized Distribution of Relaxation Times Analysis for the Characterization of Impedance Spectra

Contact Info

Product

Resources

About

Complex Impedance Analysis on Charge Accumulation Step of Mn₃O₄ Nanoparticles during Water Oxidation

Complex Impedance Analysis on Charge Accumulation Step of Mn₃O₄ Nanoparticles during Water Oxidation