A Bruker D8 X-ray diffractometer (XRD) with CuKα radiation and linear position sensitive detector was used to collect X-ray diffraction data. Patterns were recorded over the 2θ range 15o to 80o with a 0.02o step size. The electrochemical stability of SS//LLZCO25//Li cell was tested by CV over the voltage range of -0.4 V to 4 V vs Li/Li+, with a scan rate of 1 mVs-1, using a Biologic SP150 potentiostat. The plating/stripping curves were recorded using a Bio-logic SP50 cell tester.