Equal amounts of pristine Li3InCl6 and one of the above-given electrode materials (typically 0.75 g each) were mixed using mortar and pestle within an Ar-filled glovebox, forming a model black mass used for separation experiments. The mixture was transferred into a glass beaker and mixed with distilled H2O in an ambient atmosphere. The resulting suspension was stirred for approximately 15 minutes, followed by filtration of the suspended particles using filter paper (Carl Roth GmbH +Co. KG, Rotilabo® -roundfilters, type 115A). The residue was rinsed thrice with distilled H2O, dried in air, and stored in the glovebox. The filtrate was filtered a second time using a syringe filter (Sigma Aldrich, hydrophilic PTFE 0.2 µm Membrane), to remove residual electrode particles that passed through the filter paper. Afterwards, the H2O was evaporated at 100 °C under continuous stirring. The obtained powder was ground and further dried under vacuum at 200 °C for 8 hours.