Reduced Energy Barrier for Li⁺ Transport Across Grain Boundaries with Amorphous Domains in LLZO Thin Films.

ABSTRACT: The high-resistive grain boundaries are the bottleneck for Li⁺ transport in Li₇La₃Zr₂O₁₂ (LLZO) solid electrolytes. Herein, high-conductive LLZO thin films with cubic phase and amorphous domains between crystalline grains are prepared, via annealing the repetitive LLZO/Li₂CO₃/Ga₂O₃ multi-nanolayers at 600 °C for 2 h. The amorphous domains may provide additional vacant sites for Li⁺, and thus relax the accumulation of Li⁺ at grain boundaries. The significantly improved ionic conductivity across grain boundaries demonstrates that the high energy barrier for Li⁺ migration caused by space charge layer is effectively reduced. Benefiting from the Li⁺ tran

SUBMITTER: Zhu Y 

PROVIDER: S-EPMC7382668 | biostudies-literature | 2020 Jul

REPOSITORIES: biostudies-literature