|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Materials for Energy Conversion and Storage
||Nanostructured Garnet Electrolytes: Synthesis, Structure, and Electrochemical Properties
||Ting Yang, Jon M Weller, Candace K Chan
|On-Site Speaker (Planned)
||Candace K Chan
Lithium lanthanum zirconate (Li7La3Zr2O12, LLZO) is a promising ceramic solid electrolyte for all-solid-state lithium batteries. The tetragonal and cubic phases of LLZO display several orders of magnitude difference in lithium ionic conductivity, with extrinsic dopants often required to stabilize the desired cubic phase. Here we show that cubic LLZO can be stabilized in nanostructured particles without the use of extrinsic dopants. Methods for preparing nanostructured LLZO, including electrospinning, templating, sol-gel, and molten salt approaches will be discussed. Using nanostructured LLZO over bulk LLZO can be beneficial in terms of ionic conductivity, cycle life, and mechanical strength. LLZO nanomaterials can also be used as ceramic fillers in solid polymer electrolytes and can improve the ionic conductivity of the polymer by 3 orders of magnitude at only 5 wt% loading. Solid state nuclear magnetic resonance spectroscopy is used to study the preferred lithium diffusion pathways in these composite polymer electrolytes.