shows a lower sulfur utilisation, the concentration of unreacted sulfur remaining in the electrolyte is 10.92 mol mm -3 , leading to a reduction in the performance. The present study is restricted to C/10 discharge capacity. At higher C-rates, the reactions are relatively fast so the higher mass transport resistance offered due to a tortuous or isolated microstructure could not supply Li+ at the required rate and would result in a more heterogeneous distribution of dissolved sulfur, and consequently increased heterogeneities in the cell performance. This could lead to heterogeneous DoDs present in the electrode and mechanical stresses arising from the heterogeneous expansion of the Li-S batteries, affecting cell performance and eventually battery life. This highlights the need to optimise the microstructure of Li-S electrodes in order to achieve better rate performance and to minimise degradation over the lifetime of the cell. More homogenous electrodes may allow higher c-rates to be modelled in future work.