Paddle wheel mechanism in lithium sulfates: Arguments in defense and evidence against

摘要: The “paddle wheel” mechanism proposed by Lunden et al. to account for fast cation conductivity in “rotator” phase Li 2 SO 4 -based compositions involves rotation/reorientation where propels passage of the cation. Existing literature results are collated and interpreted show that these cannot be reconciled paddle wheel mechanism. A number factors cited herein can contribute facilitating intersite mobility cations enhancement ionic conductivity. experimental suport transport compositions, other sulfatee-based (viz., Na , Ag ) a “percolation-type” “free volume” lattice framework plays predominant role. rotating sulfate anions may conductivity, not direct coupling with + but indirectly increasing probability successful translational jump when favorable instantaneous orientations oxygens occur at “bottleneck”, i.e., acting as gate. That is, gate action percolation-type assigns passive role simply allowing no transfer momentum. facility through larbe bottleneck size highly supple is also considered contributing factor.