Synthesis and characterization of Ca (1− x ) Sm x F (2+ x ) (0 ≤ x ≤ 0.15) solid electrolytes for fluoride‐ion batteries

Calcium fluoride solid electrolytes have been identified as a candidate for solid-state fluoride-ion batteries (FIBs). Here, we investigate the doping of CaF2 with samarium — Ca1−xSmxF2+x (0 ≤ x 0.15) obtained by synthesis via high-energy ball milling. Structural, morphological, and ionic conductivity studies as-prepared materials were examined. It reveals that fluorite-type structure is dominating crystallite size 12–14 nm. The highest at room temperature had Ca0.95Sm0.05F2.95 value 2.8 × 10−6 S·cm−1. proves small content Sm can considerably improve CaF2.