Comparision of Electrochemical Properties of Lithium Sulfur Battery with Lithium Foil Anode and Li Powder Anode

Abstract

Lithium Sulfur (Li-S) battery has a theoretically high specific capacity of 1675 mAh/g, which one of the most promising energy source for electric vehicles (EVs), hybrid electric vehicles (HEVs). However, Li-S batteries have problems resulting from the polysulfides dissolution into the electrolyte, volumetric extension of sulfur and insulating property of elemental sulfur. These causes make the loss of active materials and the capacity fading phenomenon. Even we address the as-mentioned issues, we necessarily encounter the formation of dendrite on the lithium metal anode. In our research, we use a lithium powder as an anode material to suppress the dendritic issue of lithium metal. The examination was conducted by comparing between the lithium foil and lithium powder. The cyclic voltammetry were tested at the scan rate of 0.1mV/s and 0.5mV/s with voltage range of 1.5V to 3.0V. Cells were tested at the current densities of 0.2 C-rate and 0.5 C-rate with 1.7V to 2.8V.