Nevertheless, their instability when paired with Li anode and relatively high production costs limit their application as bulk solid electrolytes. This is, when used as catholyte or in particular coating additive, however, less relevant, which makes them a promising alternative. To avoid direct contact to, e.g., Li, et al proposed a dual electrolyte approach, where LPSCl is used as separator and LIC as catholyte. However, the assembled Li-In|LPSCl|NMC cell has been only functional at elevated temperatures (60 °C), due to the large amount and higher thickness of LIC that result in higher cell impedance. To overcome kinetic limitations Ye, et al. used LPSCl and LIC as catholyte in the NMC composite cathode by using a slurry coating method . They observed an improved initial discharge capacity in their Li-In|LPSCl|NMC cell, when LIC is introduced. However, the long-term electrochemical performance appears to be relatively poor (77.4 % capacity retention after 100 cycles) even at a lower C-rate of 0.1C. The poor cycling performance is likely due to the insufficient covering of NMC particles by LIC during slurry processing causing an irreversible capacity loss as a consequence of electrolyte decomposition.