| About this Abstract |
| Meeting |
2023 TMS Annual Meeting & Exhibition
|
| Symposium
|
Powder Materials Processing and Fundamental Understanding
|
| Presentation Title |
LLZO Powder Synthesis & Design for Maintaining Li Stoichiometry in Powders and Dense Membranes |
| Author(s) |
Stephen Kevin Heywood, Stephen Sofie, David Driscoll |
| On-Site Speaker (Planned) |
Stephen Kevin Heywood |
| Abstract Scope |
Lithium lanthanum zirconium oxide garnet (LLZO) as a solid-state lithium ion conducting electrolyte has immense promise for solid-state-batteries owing to its high lithium conductivity and chemical stability with lithium metal. Given the range of ceramic materials processing constraints including milling, calcination, and sintering at temperatures above 1000 Celsius, lithium volatility can drive deleterious phase formation. This study examined the effect of excess lithium concentration, and phase formation pathways via XRD in-situ and post sintering , coupled with TGA and EIS to elucidate mechanisms that reduce the processing sensitivities of LLZO for the scalable production of LLZO powders. Processing sensitivities ameliorated via direct incorporation of excess lithium within the LLZO lattice provides a key advantage towards the improved suppression of lithium volatilization in ceramic aqueous slurry processing for both porous electrodes and dense separators in solid-state-batteries. Further, LLZO scaffold based cells were fabricated into 2032 buttons and performance will be reported. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Ceramics, Energy Conversion and Storage, Powder Materials |