In this model, the mass transport in the electrolyte was described using concentrated solution theory and electro-neutrality. Electron transport was limited to the CBD domain, and obeyed Ohms' law with the diffusion of Li + in the electrolyte modelled using Fick's law. The five-step sulfur reduction reaction was modelled using a concentration-dependent Butler-Volmer reaction. The discharge performance was obtained at three constant discharge currents to investigate the effect of microstructure at varying global C-rates (C/10, C/20 and C/30). Here, the global C-rate is defined as the C-rate based on the total S loading obtained from the entire CT volume. For the sub-volumes investigated later in this work, an applied global C-rate may equate to a different effective C-rate for the sub-volume, depending on the volume of S present in that sub-volume.