Mechanochemical synthesis of Li2OHI with enhanced lithium ionic conductivity

Lithium hydroxide halides, as a family of lithium-ion conductive materials, have a promising potential on the application of solid state electrolytes. In this work, we have synthesized orthohombic Li2OHI through a facile mechanochemical method. The obtained sample exhibits a higher lithium-ion conductivity than solid sintering, which can be attributed to the high purity and crystallinity obtained from ball milling. Ball milling can avoid the phase segregation of Li2OHI at high temperature and promote the sufficient eutectic reaction of binary system, which can be widely used in the synthesis of other materials with low melting points.