Electrical conductivity of Al-doped Li2ZrO3 ceramics for Li-ion conductor electrolytes
By Yang, Lin; Zhang, Hong; Chen, Jiahao; Chen, Hongzhu; Li, Zhicheng
Published in Ceramics International
2021
Abstract
All-solid-state Li-ion batteries (LIBs) have recently attracted widespread attention for their high energy density and safety. Some research have conducted on the Li2ZrO3-based Li-ion conductor electrolytes, while there is little work on the conductivity below 100 °C, although it is very important for LIBs work around room temperature. Here, monoclinic Li2ZrO3-based ceramics are prepared via a wet chemistry method, and the conductivities of Li2ZrO3 ceramics are tuned by defect engineering of Al3+ ions introduction. The conductivity of Al-doped Li2ZrO3 reaches up to 3.06 × 10-4 S cm-1 at 25 °C, the related activation energy of conduction is less than 0.1 eV. Simulation calculation using bond valence site energy reveals that there is a two-dimensional Li-ion migration network in the crystal structure of Li2ZrO3.