In conclusion, KSC was successfully synthesized using mechanochemistry with a cubic space group (Fm-3m). Comprehensive structural and morphological characterization provided deeper understanding of the material's properties. Electrochemical studies were conducted to assess the potential of KSC as an electrode material for CIBs using a non-aqueous 0.5M PP14Cl in PC electrolyte. It demonstrated an initial discharge capacity of 350 mA h g -1 , but this dropped significantly to a reversible capacity of 51 mAh g -1 after 50 cycles at 25 mA g -1 . Ex-situ characterization techniques like XRD, XPS, and FE-SEM revealed that the electrochemical storage mechanism relies on a conversion reaction involving multiple products and the movement of chloride ions between the electrodes. Density functional theory calculations further supported the identification of these potential degradation products, which were also confirmed by experimental results. These degradation processes limit the performance of KSC as a promising electrode material for non-aqueous CIBs. This work serves as a stepping stone, inspiring future investigations into similar materials, optimization strategies, and novel electrode architectures to enhance energy storage performance in battery applications.