A novel impedance spectrometer based on carrier function Laplace-transform of the response to arbitrary excitation

Barsoukov, Evgenij; Ryu, Sang Hyo; Lee, Hosull

doi:10.1016/s0022-0728(02)01209-3

Cited by 34 publications

(36 citation statements)

References 17 publications

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“…The model of the overvoltage is obtained from an equivalent circuit, R s C bat (RC) 1 (RC) 2 (RC) 3 (RC) 4 , where R is a resistor and C is a capacitor, (RC) is a parallel connection between a resistor and a capacitor and R s , C bat and (RC) 1-4 are serially connected. As shown in the discussion section, the number of (RC)-circuits was chosen as the smallest number that fulfilled the first of the above mentioned criteria.…”

Section: Resultsmentioning

confidence: 99%

“…A weighing factor of 1/t n was used in the calculation of Err to equalize the weighting of the involved variables as much as possible and thus stabilizing the conversion of the fitting routine: Suppose (RC) 1 primarily models the part of the impedance spectrum from 0.1 Hz to 0.01 Hz and (RC) 4 primarily models the part of the impedance spectrum from 0.001 Hz to 0.0001 Hz. This means the U m (t) measurements from 10 seconds to 100 seconds are primarily modeled by (RC) 1 and the U m (t) measurements from 1000 seconds to 10000 seconds are primarily modeled by (RC) 4 (temporarily disregarding that the we only measured U m (t) for 3600 seconds).…”

Section: Resultsmentioning

confidence: 99%

“…This means the U m (t) measurements from 10 seconds to 100 seconds are primarily modeled by (RC) 1 and the U m (t) measurements from 1000 seconds to 10000 seconds are primarily modeled by (RC) 4 (temporarily disregarding that the we only measured U m (t) for 3600 seconds). Because U m (t) was measured approximately every 2 nd second, 45 measurements were conducted from 10 to 100 seconds and 4500 measurements were obtained between 1000 and 10000 seconds.…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Measurements of Electric Performance and Impedance of a 75 Ah NMC Lithium Battery Module

Jensen

Engelbrecht

Bernuy-López

2012

J. Electrochem. Soc.

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Detailed characterization of battery modules is necessary to construct reliable models that incorporate performance related aspects of the modules such as thermodynamics, electrochemical reaction kinetics and degradation mechanisms. Charge-discharge curves, temperature and battery impedance measurements can provide information about these aspects. Charge-discharge curves can be used to measure the battery open circuit voltage and the internal resistance. Temperature measurements provide information about the thermodynamic reactions and impedance spectra yield detailed information about the reaction kinetics. In this paper we present the measurement methods used to examine the internal resistance, the capacity and the impedance of a 75 Ah NMC battery module. In order to measure the impedance of the battery module and of the individual cells in the module, we combine the single sine technique and the Laplace transformed excitation signal technique which each have pros and cons. By combining the two impedance measurement techniques we are able to reduce the measurement time by a factor of 20 relative to ordinary single-sine measurements. Further we use the impedance measurements to calculate the overvoltage as a function of state of charge and the difference between charging overvoltage and discharging overvoltage and compare it with measurements.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Measurements of Electric Performance and Impedance of a 75 Ah NMC Lithium Battery Module

Jensen

Engelbrecht

Bernuy-López

2012

J. Electrochem. Soc.

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show abstract

“…Barsoukov et al recently incorporated this technique into an electrochemical impedance spectrometer by using a variety of excitation signals such as current step, voltage step, current interrupt, and others (31). One vendor's instrument made high-frequency measurements first with the FRA, and then the multiwave FFT method took over when the frequency went below a certain limit.…”

Section: Measuring Impedancementioning

confidence: 99%

Peer Reviewed: Electrochemical Impedance Spectroscopy for Better Electrochemical Measurements

Park¹,

Yoo²

2003

Anal. Chem.

379

150

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“…[10][11][12][13][14][15][16][17] By investigating the impedance response, the charge transport resistance, including electron transport in the solid phase, ionic transport in the electrolyte, solid-state diffusion in the active material, and the intercalation process, can be quantified.…”

mentioning

confidence: 99%

Influence of Microstructure on Impedance Response in Intercalation Electrodes

Cho

Chen

Mukherjee

2015

J. Electrochem. Soc.

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The active particle morphology and microstructure affect the impedance behavior of intercalation electrodes due to the underlying charge transport, active material/electrolyte interfacial surface area, and solid-phase diffusion in lithium-ion batteries (LIB). In order to capture the impact of the electrode microstructural variability on the impedance response, an integrated electrochemical impedance predictive analysis is presented. In the analysis, stochastically reconstructed 3-D microstructures of representative LIB electrodes are considered with variations in the active material morphology and particle size distribution. With the properties evaluated from the virtual 3-D microstructures, the corresponding impedance response is predicted. The concept of electrochemical Sauter mean diameter (ESMD) has been introduced to investigate the effect of active particle morphology, such as particle agglomeration. This integrated analysis is envisioned to offer a virtual impedance response probing framework to elucidate the influence of electrode microstructural variability and underlying electrochemical and transport interactions. Lithium-ion batteries (LIBs), due to their favorable energy density and power capability, are considered as the candidate of choice for vehicle electrification. [1][2][3][4] To further improve the cell performance, different efforts have been undertaken to study the microstructural characteristics, including electrode thickness, 5 porosity, 6 particle size, 7 conductive additives 8 and composition. 9 Particularly, the influence of electrode microstructure on charge (i.e. electron and ion) transport, and solid-phase diffusion is critical, which ultimately affects the cell performance.One of the powerful methods for analyzing the electrochemical and transport behavior in porous electrodes is the electrochemical impedance spectroscopy (EIS), which measures the response of a small perturbation of potential or current.10-17 By investigating the impedance response, the charge transport resistance, including electron transport in the solid phase, ionic transport in the electrolyte, solid-state diffusion in the active material, and the intercalation process, can be quantified.14,18-26 Meyers et al. proposed a mathematical model to capture the impedance behavior of a spherical active particle dependent on the physical properties related to the faradaic and nonfaradaic impedance.14 The model also included the effect of particle size distribution on the impedance response.The impedance response of intercalation electrodes, which is sensitive to the interfacial processes, the surface morphology, and the charge transport, has been described mathematically by the fundamental physical approach for various electrochemical systems.14,27-39The effect of various properties, such as electrical and ionic conductivity, and layer thickness, have been investigated by Levi and Aurbach. 28 Besides the electrode properties (e.g. electrical conductivity, ionic conductivity, and layer thickness), the electrode microst...

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A novel impedance spectrometer based on carrier function Laplace-transform of the response to arbitrary excitation

Cited by 34 publications

References 17 publications

Measurements of Electric Performance and Impedance of a 75 Ah NMC Lithium Battery Module

Measurements of Electric Performance and Impedance of a 75 Ah NMC Lithium Battery Module

Peer Reviewed: Electrochemical Impedance Spectroscopy for Better Electrochemical Measurements

Influence of Microstructure on Impedance Response in Intercalation Electrodes

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