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Electrical Characterization and Micro X-ray Computed Tomography Analysis of Next-Generation Silicon Alloy Lithium-Ion Cells. / Berckmans, Gert Jan; De Sutter, Lysander; Kersys, Algirdas; Kriston, Akos; Marinaro, Mario; Kasper, Michael; Axmann, Peter; Smekens, Jelle; Wohlfahrt-Mehrens, Margret; Pfrang, Andreas; Jaguemont, Joris; Van Mierlo, Joeri; Omar, Noshin.

In: World Electric Vehicle Journal, Vol. 9, No. 3, 43, 19.10.2018, p. 1-14.

Research output: Contribution to journalArticle

Harvard

Berckmans, GJ, De Sutter, L, Kersys, A, Kriston, A, Marinaro, M, Kasper, M, Axmann, P, Smekens, J, Wohlfahrt-Mehrens, M, Pfrang, A, Jaguemont, J, Van Mierlo, J & Omar, N 2018, 'Electrical Characterization and Micro X-ray Computed Tomography Analysis of Next-Generation Silicon Alloy Lithium-Ion Cells', World Electric Vehicle Journal, vol. 9, no. 3, 43, pp. 1-14. https://doi.org/10.3390/wevj9030043

APA

Vancouver

Author

Berckmans, Gert Jan ; De Sutter, Lysander ; Kersys, Algirdas ; Kriston, Akos ; Marinaro, Mario ; Kasper, Michael ; Axmann, Peter ; Smekens, Jelle ; Wohlfahrt-Mehrens, Margret ; Pfrang, Andreas ; Jaguemont, Joris ; Van Mierlo, Joeri ; Omar, Noshin. / Electrical Characterization and Micro X-ray Computed Tomography Analysis of Next-Generation Silicon Alloy Lithium-Ion Cells. In: World Electric Vehicle Journal. 2018 ; Vol. 9, No. 3. pp. 1-14.

BibTeX

@article{40b5c8a831494516b51c9a8384904172,
title = "Electrical Characterization and Micro X-ray Computed Tomography Analysis of Next-Generation Silicon Alloy Lithium-Ion Cells",
abstract = "This study analyzed a prototype of a pouch cell containing silicon alloy anodes with the potential to significantly increase the energy density, resulting in improved autonomy for electric vehicles. An electrical characterization campaign was performed, resulting in three main observations. Firstly, measurements showed a high energy density, although a high lower cutoff voltage (3.0 V) was used due to the prototypical nature of the cells. Further optimization would allow a decrease of the lower cutoff voltage, resulting in an even higher energy density. Secondly, a large open-circuit voltage hysteresis was observed, increasing the complexity for equivalent circuit models. Thirdly, ballooning of the pouch cell was observed, most likely caused by gas formation. This leads to a loss of active surface area, significantly reducing the cell’s capacity. This third observation was more thoroughly investigated by 3D computed tomography, which showed mechanical deformation of the layers. An extensive literature review revealed that the addition of fluoroethylene carbonate (FEC) to the electrolyte enhances the cycling stability of silicon alloy batteries but leads to the production of CO 2 as a side reaction. Furthermore, the usage of external pressure was proposed and validated as a methodology to reduce the production of CO 2 while improving the cells’ performance.",
keywords = "High energy density, Nickel-rich NMC, Silicon alloy",
author = "Berckmans, {Gert Jan} and {De Sutter}, Lysander and Algirdas Kersys and Akos Kriston and Mario Marinaro and Michael Kasper and Peter Axmann and Jelle Smekens and Margret Wohlfahrt-Mehrens and Andreas Pfrang and Joris Jaguemont and {Van Mierlo}, Joeri and Noshin Omar",
year = "2018",
month = "10",
day = "19",
doi = "10.3390/wevj9030043",
language = "English",
volume = "9",
pages = "1--14",
journal = "World Electric Vehicle Journal",
issn = "2032-6653",
publisher = "The World Electric Vehicle Association (WEVA)",
number = "3",

}

RIS

TY - JOUR

T1 - Electrical Characterization and Micro X-ray Computed Tomography Analysis of Next-Generation Silicon Alloy Lithium-Ion Cells

AU - Berckmans, Gert Jan

AU - De Sutter, Lysander

AU - Kersys, Algirdas

AU - Kriston, Akos

AU - Marinaro, Mario

AU - Kasper, Michael

AU - Axmann, Peter

AU - Smekens, Jelle

AU - Wohlfahrt-Mehrens, Margret

AU - Pfrang, Andreas

AU - Jaguemont, Joris

AU - Van Mierlo, Joeri

AU - Omar, Noshin

PY - 2018/10/19

Y1 - 2018/10/19

N2 - This study analyzed a prototype of a pouch cell containing silicon alloy anodes with the potential to significantly increase the energy density, resulting in improved autonomy for electric vehicles. An electrical characterization campaign was performed, resulting in three main observations. Firstly, measurements showed a high energy density, although a high lower cutoff voltage (3.0 V) was used due to the prototypical nature of the cells. Further optimization would allow a decrease of the lower cutoff voltage, resulting in an even higher energy density. Secondly, a large open-circuit voltage hysteresis was observed, increasing the complexity for equivalent circuit models. Thirdly, ballooning of the pouch cell was observed, most likely caused by gas formation. This leads to a loss of active surface area, significantly reducing the cell’s capacity. This third observation was more thoroughly investigated by 3D computed tomography, which showed mechanical deformation of the layers. An extensive literature review revealed that the addition of fluoroethylene carbonate (FEC) to the electrolyte enhances the cycling stability of silicon alloy batteries but leads to the production of CO 2 as a side reaction. Furthermore, the usage of external pressure was proposed and validated as a methodology to reduce the production of CO 2 while improving the cells’ performance.

AB - This study analyzed a prototype of a pouch cell containing silicon alloy anodes with the potential to significantly increase the energy density, resulting in improved autonomy for electric vehicles. An electrical characterization campaign was performed, resulting in three main observations. Firstly, measurements showed a high energy density, although a high lower cutoff voltage (3.0 V) was used due to the prototypical nature of the cells. Further optimization would allow a decrease of the lower cutoff voltage, resulting in an even higher energy density. Secondly, a large open-circuit voltage hysteresis was observed, increasing the complexity for equivalent circuit models. Thirdly, ballooning of the pouch cell was observed, most likely caused by gas formation. This leads to a loss of active surface area, significantly reducing the cell’s capacity. This third observation was more thoroughly investigated by 3D computed tomography, which showed mechanical deformation of the layers. An extensive literature review revealed that the addition of fluoroethylene carbonate (FEC) to the electrolyte enhances the cycling stability of silicon alloy batteries but leads to the production of CO 2 as a side reaction. Furthermore, the usage of external pressure was proposed and validated as a methodology to reduce the production of CO 2 while improving the cells’ performance.

KW - High energy density

KW - Nickel-rich NMC

KW - Silicon alloy

UR - http://www.scopus.com/inward/record.url?scp=85057564742&partnerID=8YFLogxK

U2 - 10.3390/wevj9030043

DO - 10.3390/wevj9030043

M3 - Article

VL - 9

SP - 1

EP - 14

JO - World Electric Vehicle Journal

JF - World Electric Vehicle Journal

SN - 2032-6653

IS - 3

M1 - 43

ER -

ID: 39906143