Our experiments showed that the anodic limit of LNCl is ~0.6 V (vs Li + /Li) which is significantly lower than the previously reported >2 V (vs Li + /Li) and matches our first principles thermodynamic calculations. We established that the anodic limit of LNCl confines its potential role in ASSBs to an artificial buffer layer between LM and other highly-conducting SEs where the thermodynamic stability of LNCl against LM may be beneficial. Our calculations show that from a thermodynamic viewpoint, LNCl is chemically better compatible with common highly-conducting SEs than Li3N. Future investigations on LNCl should focus on different synthesis approaches of LNCl, how they affect sub-ordering of the N/Cl anionic framework and how this may potentially affect Li ion conductivity. Additionally, doping strategies have previously been investigated and should be further explored.