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Simulation and measurement of local potentials of modified commercial cylindrical cells: I. Cell preparation and measurements

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Simulation and measurement of local potentials of modified commercial cylindrical cells : I. Cell preparation and measurements. / Osswald, P. J.; Erhard, S. V.; Wilhelm, J.; Hoster, H. E.; Jossen, A.

In: Journal of The Electrochemical Society, Vol. 162, No. 10, 05.08.2015, p. A2099-A2105.

Research output: Contribution to journalJournal articlepeer-review

Harvard

Osswald, PJ, Erhard, SV, Wilhelm, J, Hoster, HE & Jossen, A 2015, 'Simulation and measurement of local potentials of modified commercial cylindrical cells: I. Cell preparation and measurements', Journal of The Electrochemical Society, vol. 162, no. 10, pp. A2099-A2105. https://doi.org/10.1149/2.0561510jes

APA

Osswald, P. J., Erhard, S. V., Wilhelm, J., Hoster, H. E., & Jossen, A. (2015). Simulation and measurement of local potentials of modified commercial cylindrical cells: I. Cell preparation and measurements. Journal of The Electrochemical Society, 162(10), A2099-A2105. https://doi.org/10.1149/2.0561510jes

Vancouver

Osswald PJ, Erhard SV, Wilhelm J, Hoster HE, Jossen A. Simulation and measurement of local potentials of modified commercial cylindrical cells: I. Cell preparation and measurements. Journal of The Electrochemical Society. 2015 Aug 5;162(10):A2099-A2105. https://doi.org/10.1149/2.0561510jes

Author

Osswald, P. J. ; Erhard, S. V. ; Wilhelm, J. ; Hoster, H. E. ; Jossen, A. / Simulation and measurement of local potentials of modified commercial cylindrical cells : I. Cell preparation and measurements. In: Journal of The Electrochemical Society. 2015 ; Vol. 162, No. 10. pp. A2099-A2105.

Bibtex

@article{bf25641531c24681b8717cae396262f3,
title = "Simulation and measurement of local potentials of modified commercial cylindrical cells: I. Cell preparation and measurements",
abstract = "This work presents a modification approach and first measurements of commercial cylindrical Li-ion cells with multiple local potential probes and an internal temperature sensor. Local potential measurements at low currents show a non-uniform potential distribution along the electrode, dominated by the open circuit voltage (OCV) of the negative electrode. For higher currents, the overpotential along the current collector becomes dominant and instead of a corrugated potential distribution, a significant current dependent voltage gradient can be detected, indicating a highly non-uniform state of charge (SOC) distribution with increasing distance to the current collecting tab. After the discharge operation, a quick potential equalization can be witnessed which results in a non-detectable potential difference between the single electrode sections after 12 min, even though the overall cell voltage relaxation has not reached an equilibrium state yet. The presented modification approach combines the advantages of high quality industrial manufactured cells showing uniform coating thicknesses and packing density with the advantages of special tailor made cells for in situ measurements. Due to the low impact of the modification and its long-term stability, highly reproducible measurements can be conducted at different locations of the electrodes.",
keywords = "commercial cell modification, current density distribution, internal temperature, local potential measurements, state of charge (SOC) inhomogeneities",
author = "Osswald, {P. J.} and Erhard, {S. V.} and J. Wilhelm and Hoster, {H. E.} and A. Jossen",
note = "Copyright {\textcopyright} 2015 by ECS -- The Electrochemical Society",
year = "2015",
month = aug,
day = "5",
doi = "10.1149/2.0561510jes",
language = "English",
volume = "162",
pages = "A2099--A2105",
journal = "Journal of The Electrochemical Society",
issn = "0013-4651",
publisher = "Electrochemical Society, Inc.",
number = "10",

}

RIS

TY - JOUR

T1 - Simulation and measurement of local potentials of modified commercial cylindrical cells

T2 - I. Cell preparation and measurements

AU - Osswald, P. J.

AU - Erhard, S. V.

AU - Wilhelm, J.

AU - Hoster, H. E.

AU - Jossen, A.

N1 - Copyright © 2015 by ECS -- The Electrochemical Society

PY - 2015/8/5

Y1 - 2015/8/5

N2 - This work presents a modification approach and first measurements of commercial cylindrical Li-ion cells with multiple local potential probes and an internal temperature sensor. Local potential measurements at low currents show a non-uniform potential distribution along the electrode, dominated by the open circuit voltage (OCV) of the negative electrode. For higher currents, the overpotential along the current collector becomes dominant and instead of a corrugated potential distribution, a significant current dependent voltage gradient can be detected, indicating a highly non-uniform state of charge (SOC) distribution with increasing distance to the current collecting tab. After the discharge operation, a quick potential equalization can be witnessed which results in a non-detectable potential difference between the single electrode sections after 12 min, even though the overall cell voltage relaxation has not reached an equilibrium state yet. The presented modification approach combines the advantages of high quality industrial manufactured cells showing uniform coating thicknesses and packing density with the advantages of special tailor made cells for in situ measurements. Due to the low impact of the modification and its long-term stability, highly reproducible measurements can be conducted at different locations of the electrodes.

AB - This work presents a modification approach and first measurements of commercial cylindrical Li-ion cells with multiple local potential probes and an internal temperature sensor. Local potential measurements at low currents show a non-uniform potential distribution along the electrode, dominated by the open circuit voltage (OCV) of the negative electrode. For higher currents, the overpotential along the current collector becomes dominant and instead of a corrugated potential distribution, a significant current dependent voltage gradient can be detected, indicating a highly non-uniform state of charge (SOC) distribution with increasing distance to the current collecting tab. After the discharge operation, a quick potential equalization can be witnessed which results in a non-detectable potential difference between the single electrode sections after 12 min, even though the overall cell voltage relaxation has not reached an equilibrium state yet. The presented modification approach combines the advantages of high quality industrial manufactured cells showing uniform coating thicknesses and packing density with the advantages of special tailor made cells for in situ measurements. Due to the low impact of the modification and its long-term stability, highly reproducible measurements can be conducted at different locations of the electrodes.

KW - commercial cell modification

KW - current density distribution

KW - internal temperature

KW - local potential measurements

KW - state of charge (SOC) inhomogeneities

U2 - 10.1149/2.0561510jes

DO - 10.1149/2.0561510jes

M3 - Journal article

AN - SCOPUS:84940062591

VL - 162

SP - A2099-A2105

JO - Journal of The Electrochemical Society

JF - Journal of The Electrochemical Society

SN - 0013-4651

IS - 10

ER -