LPSCl and NCA were purchased from NEI corporation and used as received. Li3InCl6 was prepared via a two-step synthesis process: (i) Li chloride (LiCl, Sigma-Aldrich, 99.9%) and indium chloride (InCl3, Sigma-Aldrich, 99.99%) were weighed to the stoichiometric molar ratio (3:1) and mechanically mixed in a ZrO2 container with ZrO2 balls (diameter = 5 and 10 mm, 1:1, wt.%) in a planetary ball mill (Fritsch, Pulverisette 7) at 500 rpm for 24 h, and (ii) The obtained Li3InCl6 powder was pelletized at 300 MPa and further annealed at 300 °C with a heating rate of 2 o C / min for 5 h in Ar atmosphere. The an-LIC was further ball milled for 50 h to prepare fine LIC powder for mechanofusion.