To address the climate change, in recent decades the global demand for advanced energy storage solutions has grown, especially that for batteries based on lithium chemistry. Lithium-sulfur batteries (Li-S) have emerged as a promising candidate for next-generation batteries due to their high theoretical specific energy, reduced costs and environmental friendliness. However, challenges such as capacity fading, volume fluctuation and poor cycle life hinder their the wide scale commercialization. This thesis investigates the performance of Li-S cells through experimental testing and proposes a predictive model to forecast discharge curves, aiming to enhance the understanding and optimization of these cells. The research begins with the assembly of Li-S cells employing materials and fabrication techniques commonly used in this field.