Preparation of Sodium Ion Conductive Na10GeP2S12 Glass-ceramic Electrolytes

Na10GeP2S12 glass and glass-ceramic were synthesized here for the first time via mechanical milling and subsequent heat treatment. The Na10GeP2S12 phase prepared in this study had a similar crystal structure to the Na10SnP2S12 phase reported previously. The ionic conductivity at room temperature and the activation energy of the Na10GeP2S12 glass-ceramic were 1.2 × 10−5 S cm−1 and 44 kJ mol−1, respectively.