Dynamic formation of a solid-liquid electrolyte interphase and its consequences for hybrid-battery concepts

Li+-selective solid electrolytes may enable next-generation battery systems, such as Li–S and Li–O2. Now, in an exemplar system, it is shown that a resistive interphase forms at the interface between solid and liquid electrolytes, termed the solid-liquid electrolyte interphase (SLEI). An in situ study of this undesirable effect is supported by state-of-the-art surface analysis.