Compared to most other relevant solid electrolyte families, chlorides have a higher oxidative stability and are compatible with 4V cathodes . This is an important property, as otherwise electronically insulating coatings have to be utilized to protect the electrolyte from the high potential of the cathode. In this context, it was recently demonstrated that a spinel Li2InxSc2/3-xCl4 (0 ≤ x ≤ 0.666) solid electrolyte, in combination with an uncoated LiNi0.85Co0.1Mn0.05O2, cathode achieved more than 3000 cycles with 80% capacity retention (cycled between 2.8-4.3V vs Li/Li + ) , which represents a milestone in the development of allsolid state batteries.