Wet Mechanical Milling Induced Phase Transition to Cubic Anti-Perovskite Li2OHCl

Anti-perovskite solid-state electrolyte Li₂ OHCl usually exhibits orthorhombic phase and low ionic conductivity at room temperature. However, its ionic conductivity increases greatly when the temperature is up to 40℃, while it goes through an orthorhombic-to-cubic phase transition. The cubic Li₂ OHCl with high ionic conductivity is stabilized at room temperature and even lower temperature about 10℃ by a simple synthesis method of wet mechanical milling. The cubic Li₂