Fig. 7: Theoretical prediction of the pathways of Li-ions for PBAs.

a Bond Valence Energy Landscape (BVEL) calculation for Li-ions in LiFeHCF samples. b Bond Valence Sum Mismatch map (BVS) calculation for oxide ions in LiFeHCF samples. The selected projection on (100), (110) and (111) planes were presented, indicating that Li-ions can be transported 3-dimensionally through the void of PBA compounds. c BVEL with different Z values on the (100) planes.