Application of Localized Electrochemical Impedance Spectroscopy to Lithium‐Ion Cathodes and in situ Monitoring of the Charging Process

Harms, Nina; Heins, Tom Patrick; Schröder, Uwe

doi:10.1002/ente.201600133

Cited by 8 publications

(3 citation statements)

References 24 publications

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“…Nevertheless, the measurement of interest has to be conducted at least twice and the measurement time is, hence, inherently doubled. Besides, for some impedance experiments as dynamic impedance spectroscopy [35,36] or localized electrochemical impedance spectroscopy [37,38] this procedure can get impossible or extremely time consuming and elaborate. Particularly, when physical changes upon repetition alter the considered impedance spectra, this variance test is not applicable.…”

Section: Theorymentioning

confidence: 99%

Direct Access to the Optimal Regularization Parameter in Distribution of Relaxation Times Analysis

2020

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The distribution of times (DRT) method has become an important extension for electrochemical impedance investigations. Calculating the DRT is particularly advantageous for complex systems, as it yields an increased resolution in frequency domain. However, the determination of the DRT from experimental impedance data requires special mathematical effort. An often‐used method for the calculation of the DRT is the Tikhonov regularization. The quality of the result of this method depends on the choice of a suitable regularization parameter. This parameter has to be selected by the user. In a former work (N. Schlüter, S. Ernst, U. Schröder, ChemElectroChem 2019, 6, 6027–6037), we showed a method that helps to find the best regularization parameter for given impedance data. However, this test was based on repetitive impedance measurements, which have to be performed at least twice. In this paper, we optimize our previous method to assure the determination of an optimal regularization parameter from just one single impedance spectrum. Eventually, this revision saves measurement time and makes our test also applicable for less time stable measurements.

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Section: Theorymentioning

confidence: 99%

Direct Access to the Optimal Regularization Parameter in Distribution of Relaxation Times Analysis

2020

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“…Combinatorial library methods are usually used in the research of catalysis, lithium batteries, and fuel cells, that is, the HT electrochemical characterization is necessary and essential. [27][28][29][149][150][151][152][153] The scanning electrochemical microscopy (SECM), [150,154] scanning vibrating electrode technique (SVET), [155] scanning Kelvin probe (SKP), [156,157] localized electrochemical impedance spectroscopy (LEIS), [158,159] scanning droplet cell (SDC), [89,[160][161][162][163] noncontact surface profiling (OSP) and ion-selective probe (ISP) are the useful electrochemical imaging and measuring techniques. [6] The VersaSCAN scanning electrochemical workstation is an HT platform capable of programmability and high spatial resolution to contactless micro-topography and electrochemical microtopography tests.…”

Section: Scanning Probe Electrochemical Microscopy and Versascan Work...mentioning

confidence: 99%

Cutting Edge High‐Throughput Synthesis and Characterization Techniques in Combinatorial Materials Science

Tan,

Wu,

Yang

et al. 2024

Adv Materials Technologies

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The Materials Genome Initiative is expected to accelerate the materials discovery and design by fundamentally changing the trial‐and‐error research paradigm. However, mass data from high‐throughput experiments is still essential for the revelation of rules and verification of theories. In fact, the development of combinatorial materials science is always on the strength of the upgrade and evolution of high‐throughput techniques in each stage, especially high‐throughput materials synthesis and characterization. Herein, this review summarizes the high‐throughput synthesis methods for combinatorial materials libraries, especially the co‐deposition and masking techniques of thin‐film fabrication; and details the high‐throughput characterization methods for specific material properties and typical material categories, which comes down to the spectroscopy and microscopy techniques. It is considered that high‐throughput concepts will be the predominant lab experimentation in the future, along with advanced experimental techniques and convenient data processing procedures. Before that, more cooperation between multiple researchers from different fields should be conducted to complete the combinatorial materials research, since the high‐throughput technology covers multiple disciplines with a huge span.

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“…3,4 Therefore, it is important to understand the transport mechanism of Li + in graphitic materials. [5][6][7][8][9][10] Several electrochemical techniques have been developed to determine the diffusion coefficient of Li + in graphitic materials, 7,[11][12][13][14][15] such as electrochemical impedance spectrum (EIS), galvanostatic intermittent titration technique (GITT), cyclic voltammetry (CV) and potentiostatic intermittent titration technique (PITT). Various methods for determining the diffusion coefficient of Li + in graphite have shown a huge range vary from 10 −7 to 10 −12 cm 2 •s −1 .…”

mentioning

confidence: 99%

Decoupling the Effect of Electrolyte Infiltration on the Intercalation of Alkali Metal Ions in Highly Oriented Pyrolytic Graphite

Yang

et al. 2023

J. Electrochem. Soc.

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Diffusion coefficients of ion in graphitic materials are responsible for high-rate batteries. However, the complex electrochemical response presents a challenge to accurately measuring the diffusion coefficient of alkali-metal ions in graphitic materials. Here we design a method to identify the diffusion coefficients of Li+ and Na+ in highly oriented pyrolytic graphite (HOPG) with and without presence of liquid electrolyte infiltration. The results reveal inherent high diffusivity of Li+ in HOPG (∼10-7 cm2·s-1), as compared to HOPG with electrolyte infiltration (∼10-8 cm2·s-1), while Na+ has almost no interlayer diffusion without solvent infiltration.

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Application of Localized Electrochemical Impedance Spectroscopy to Lithium‐Ion Cathodes and in situ Monitoring of the Charging Process

Cited by 8 publications

References 24 publications

Direct Access to the Optimal Regularization Parameter in Distribution of Relaxation Times Analysis

Direct Access to the Optimal Regularization Parameter in Distribution of Relaxation Times Analysis

Cutting Edge High‐Throughput Synthesis and Characterization Techniques in Combinatorial Materials Science

Decoupling the Effect of Electrolyte Infiltration on the Intercalation of Alkali Metal Ions in Highly Oriented Pyrolytic Graphite

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