Journal
ELECTROCHIMICA ACTA
Volume 322, Issue -, Pages -Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2019.134719
Keywords
Lithium-sulfur batteries; Continuum modeling; Nucleation and growth; Carbon doping; Spatial control
Categories
Funding
- state of Baden-Wurttemberg through bwHPC (bwForCluster JUSTUS)
- German Research Foundation (DFG) [INST 40/467-1 FUGG]
Ask authors/readers for more resources
Lithium-sulfur (Li-S) batteries have the potential to outperform state-of-the-art lithium-ion batteries. One of the bottle necks is the limited power density which most conversion based systems have in common. One of the reasons is the formation of solid, insulating charge and discharge products which passivate active surfaces during operation of the cell. In depth knowledge of the formation and dissolution is needed in order to develop counter-measures overcoming the current limitations. In this article we present a continuum model of Li-S batteries including a detailed description of the formation and dissolution of solid particles based on the classical theory of nucleation and growth. By evolving a particle size distribution of the Li2S and S-8 phase we are able to provide a qualitative description of the resulting particle morphology as well as their effect on active surface areas and transport processes. Results of the simulations are in agreement with experimental data published in the literature. We perform intensive parameter studies which provide guidelines for the development of surface modifications enabling a spatial control of solid discharge product precipitation resulting in improved battery performance. (C) 2019 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available