Experimental visualization of lithium conduction pathways in garnet-type Li_7La_3Zr_2O_(12)

摘要

The evolution of the Li-ion displacements in the 3D interstitial pathways of the cubic garnet-type Li_7La_3Zr_2O_(12), cubic Li_7La_3Zr_2O_(12), was investigated with high-temperature neutron diffraction (HTND) from RT to 600 ℃; the maximum-entropy method (MEM) was applied to estimate the Li nuclear-density distribution. Temperature-driven Li displacements were observed; the displacements indicate that the conduction pathways in the garnet framework are restricted to diffusion through the tetrahedral sites of the interstitial space.