Atomic-scale origin of the low grain-boundary resistance in perovskite solid electrolyte Li_0.375Sr_0.4375Ta_0.75Zr_0.25O₃.

ABSTRACT: Oxide solid electrolytes (OSEs) have the potential to achieve improved safety and energy density for lithium-ion batteries, but their high grain-boundary (GB) resistance generally is a bottleneck. In the well-studied perovskite oxide solid electrolyte, Li_3xLa_2/3-xTiO₃ (LLTO), the ionic conductivity of grain boundaries is about three orders of magnitude lower than that of the bulk. In contrast, the related Li_0.375Sr_0.4375Ta_0.75Zr_0.25O₃ (LSTZ0.75) perovskite exhibits low grain boundary resistance for reasons yet unknown. Here, we use aberration-corrected scanning transmission electron microscopy and spectroscopy, along with an active learning moment tensor potential, to reveal the atomic scale structure a

SUBMITTER: Lee T 

PROVIDER: S-EPMC10079928 | biostudies-literature | 2023 Apr

REPOSITORIES: biostudies-literature