Despite the inability to definitively identify this impurity phase, an effort was made to quantify its relative phase fraction in the recycled electrolytes by analyzing the integrated intensity of the unidentified reflections (see Table ) and relating it to the overall integrated intensity of the identified crystalline phases. The results indicate that this unknown phase has a significantly higher fraction in recycled Li3InCl6 after separation from NCA compared to other recycled materials. This suggests that the interaction between the electrolyte and Ni-rich electrode materials is more pronounced during recycling Further, the stoichiometric variation study of Li3InCl6 shows that when the composition becomes Li-rich, the system forms a mixture of Li3InCl6 and LiCl, rather than a substochiometric Li3InCl6. This aligns with the observations during recycling, where indium from Li3InCl6 is transferred to the electrode materials (as confirmed by XPS findings reported in section 3.3.2 and ICP-MS analysis in the next paragraph), leading to indium depletion in the electrolyte. Consequently, LiCl forms as a secondary phase, reflecting the Li-rich, In-deficient composition. These findings suggest that Li3InCl6 remains stable at its expected stoichiometry, with LiCl forming when indium is lost during recycling.