Comprehensive Aging Analysis of Volumetric Constrained Lithium-Ion Pouch Cells with High Concentration Silicon-Alloy Anodes

Lysander De Sutter, Gert Berckmans, Mario Marinaro, Jelle Smekens, Yousef Firouz, Margret Wohlfahrt-Mehrens, Joeri Van Mierlo and Noshin Omar
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Lysander De Sutter: ETEC Department & MOBI Research Group, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussel, Belgium—VUB-MOBI is a Core Lab Member of Flanders Make
Gert Berckmans: ETEC Department & MOBI Research Group, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussel, Belgium—VUB-MOBI is a Core Lab Member of Flanders Make
Mario Marinaro: ZSW, Zentrum für Sonnenenergie- und Wasserstoff-Forschung BW, Helmholtzstraße 8, 89081 Ulm, Germany
Jelle Smekens: ETEC Department & MOBI Research Group, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussel, Belgium—VUB-MOBI is a Core Lab Member of Flanders Make
Yousef Firouz: ETEC Department & MOBI Research Group, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussel, Belgium—VUB-MOBI is a Core Lab Member of Flanders Make
Margret Wohlfahrt-Mehrens: ZSW, Zentrum für Sonnenenergie- und Wasserstoff-Forschung BW, Helmholtzstraße 8, 89081 Ulm, Germany
Joeri Van Mierlo: ETEC Department & MOBI Research Group, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussel, Belgium—VUB-MOBI is a Core Lab Member of Flanders Make
Noshin Omar: ETEC Department & MOBI Research Group, Vrije Universiteit Brussel (VUB), Pleinlaan 2, 1050 Brussel, Belgium—VUB-MOBI is a Core Lab Member of Flanders Make

Energies, 2018, vol. 11, issue 11, 1-21

Abstract: In this research, twenty-four high capacity (1360 mAh) NMC622/Si-alloy Li-ion full pouch cells with high silicon-alloy content (55%) are cycle aged under seven different cycling conditions to study the effect of different stressors on the cycle life of Si-anode full cells, among which are the effect of ambient temperature, Depth of Discharge (DoD) and the discharge current. The cells are volumetrically constrained at an optimal initial pressure to improve their cycle life, energy and power capabilities. Furthermore, the innovative test setup allows measuring the developed pressure as a result of repeated (de-)lithiation during battery cycling. This uniquely vast testing campaign on Si-anode full cells allows us to study and quantify independently the influence of different stress factors on their cycle life for the first time, as well as to develop a new capacity fade model based on an observed linear relationship between capacity retention and total discharge capacity throughput.

Keywords: silicon; pressure; full cell; cycle aging; calendar aging; temperature influence; DoD influence; C-rate influence (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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