Excellent sodium ion conductivity and air stability of manganese-substituted Na3SbS4 solid electrolytes

We present Na 3.24 Mn 0.08 Sb 0.92 S 4 , a Mn-doped solid electrolyte with exceptional ionic conductivity (2.05 × 10 −3 S cm −1 at 25 °C), featuring a sulfide superionic conductor structure for air stability and extended room temperature storage, compatible with Na metal for promising advancements.