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A microstructurally resolved model for Li-S batteries assessing the impact of the cathode design on the discharge performance

Vigneshwaran Thangavel ; Kan Hao Xue ; Youcef Mammeri ; Matias Quiroga ; Afef Mastouri ; Claude Guéry ; Patrik Johansson (Institutionen för fysik, Kondenserade materiens fysik (Chalmers)) ; Mathieu Morcrette ; Alejandro A. Franco
Journal of the Electrochemical Society (0013-4651). Vol. 163 (2016), 13, p. A2817-A2829.
[Artikel, refereegranskad vetenskaplig]

This paper reports a discharge model for lithium sulfur (Li-S) battery cells, supported by a multi-scale description of the composite C/S cathode microstructure. The cathode is assumed to be composed of mesoporous carbon particles with inter-particular pores in-between and the sulfur impregnated into both types of pores. The electrolyte solutes such as sulfur, polysulfides and lithium ions, produced during the discharge, are allowed to exchange between the pores. Furthermore, the model describes the Li2S(solid) precipitation and its effects on transport and reduction reaction kinetics. Hereby it provides fundamental insights on the impact on the Li-S discharge curve of practically modifiable manufacturing parameters and operation designs, such as current density, carbon porosity, C/S ratio and sizes of carbon particles and pores.



Denna post skapades 2017-01-11. Senast ändrad 2017-01-16.
CPL Pubid: 246772

 

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Institutioner (Chalmers)

Institutionen för fysik, Kondenserade materiens fysik (Chalmers)

Ämnesområden

Materialkemi

Chalmers infrastruktur