A Microstructurally Resolved Model for Li-S Batteries Assessing the Impact of the Cathode Design on the Discharge Performance. Issue 13 (19th October 2016)

• Record Type: Journal Article
• Authors: Thangavel, Vigneshwaran; Xue, Kan-Hao; Mammeri, Youcef; Quiroga, Matias; Mastouri, Afef; Guéry, Claude; Johansson, Patrik; Morcrette, Mathieu; Franco, Alejandro A.
• Is Part Of: Journal of the Electrochemical Society. Volume 163:Issue 13(2016)
• Page Start: A2817
• Page End: A2829
• Publication Date: 2016-10-19
• Subjects: electrode microstructure -- lithium sulfur batteries -- modeling; Electrochemistry -- Periodicals; 541.3705
• DOI: 10.1149/2.0051614jes
• Languages: English
• ISSNs: 0013-4651

Abstract

Abstract : 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 Li 2 S ( 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.