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The influence of the anode overhang effect on the capacity of lithium-ion cells – a 0D-modeling approach

Fath, Johannes Philipp ; Alsheimer, Lennart ; Storch, Mathias ; Stadler, Jochen ; Bandlow, Jochen ; Hahn, Severin Lukas ; Riedel, Ralf ; Wetzel, Thomas (2020):
The influence of the anode overhang effect on the capacity of lithium-ion cells – a 0D-modeling approach.
In: Journal of Energy Storage, 29, p. 101344. Elsevier, ISSN 2352-152X,
DOI: 10.1016/j.est.2020.101344,
[Article]

Abstract

In this work, the behavior of the anode overhang effect in lithium-ion cells is experimentally investigated and simulated for experimental three electrode cells. An empirical method is presented to transfer the simple 0Dmodel from the experimental cell level to pouch cells. An anode overhang model will help to correctly interpret cyclic and calendaric aging experiments e.g. in terms of a more reliable and detailed separation of reversible and irreversible capacity losses as well as evaluating the actual state of health of a lithium-ion battery. For the three electrode cells different cathode diameters are used to modulate different sized anode overhang areas. Moreover, the influence of different state of charges on the reversible capacity effect is investigated. To examine the influence of the separator on the evolution of usable cell capacity different separator thicknesses are applied. It is found that the properties of the separator significantly influence the rate at which balancing processes between overhang and active region take place. The results show good accordance of the experimental results to the simulation.

Item Type: Article
Erschienen: 2020
Creators: Fath, Johannes Philipp ; Alsheimer, Lennart ; Storch, Mathias ; Stadler, Jochen ; Bandlow, Jochen ; Hahn, Severin Lukas ; Riedel, Ralf ; Wetzel, Thomas
Title: The influence of the anode overhang effect on the capacity of lithium-ion cells – a 0D-modeling approach
Language: English
Abstract:

In this work, the behavior of the anode overhang effect in lithium-ion cells is experimentally investigated and simulated for experimental three electrode cells. An empirical method is presented to transfer the simple 0Dmodel from the experimental cell level to pouch cells. An anode overhang model will help to correctly interpret cyclic and calendaric aging experiments e.g. in terms of a more reliable and detailed separation of reversible and irreversible capacity losses as well as evaluating the actual state of health of a lithium-ion battery. For the three electrode cells different cathode diameters are used to modulate different sized anode overhang areas. Moreover, the influence of different state of charges on the reversible capacity effect is investigated. To examine the influence of the separator on the evolution of usable cell capacity different separator thicknesses are applied. It is found that the properties of the separator significantly influence the rate at which balancing processes between overhang and active region take place. The results show good accordance of the experimental results to the simulation.

Journal or Publication Title: Journal of Energy Storage
Journal volume: 29
Publisher: Elsevier
Uncontrolled Keywords: Anode overhang; Lithium distribution; Reversible capacity modeling; Capacity measurement; Differential voltage analysis; Lithium-ion battery CYCLIC AGING TESTS; GRAPHITE ANODE; RECOVERY; BATTERY; PERFORMANCE
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
Date Deposited: 06 Jul 2020 06:11
DOI: 10.1016/j.est.2020.101344
Official URL: https://www.sciencedirect.com/science/article/abs/pii/S23521...
Projects: Mercedes-Benz AG
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