Fig. 5: CTA mechanism.

a Structure of the Na5SmSi4O12|Li5SmSi4O12 interface model. b Molecular dynamics trajectories of the interface model. Molecular dynamics simulation trajectories of crystalline c Li5SmSi4O12 d Na5SmSi4O12, and e Na3Li2SmSi4O12. f Minimum potential energy path along Li diffusion route in crystalline Na3Li2SmSi4O12. g XRD profiles of Na5-xLixSmSi4O12 after cycling for different times. Solid-state h 23Na and i 7Li NMR of the Na5SmSi4O12 with different cycling times.