Experimental investigation of reaction rates during electrodeposition in Li-Sulfur battery: Presented at EVS 31 EVTcC 2018, Kobe, Japan, October 1 - 3, 2018

摘要

Li-Sulfur battery has garnered attention due to its high energy density. However, owing to complex chemistry the working mechanism is still ambiguous and often contradictory among peers. Here we present an experimental investigation of Li-S battery cells where the behavior of current transient during potentiostatic discharge were studied. It was found that the formation of Li_2S is more likely through electrodeposition rather than chemical deposition. The nucleation and growth rate were measured by assuming a 2D progressive nucleation and growth. The analysis was performed on cells with different electrolyte amount. It was observed that that at rapid discharge the rate the growth is limited by mass transfer.