About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
2026 Technical Division Student Poster Contest
|
| Presentation Title |
SPG-5: Enhancing Lithium-Ion Selectivity of LLTO Membranes Via Sintering Temperature Control for Direct Lithium Extraction from Desalination Brine |
| Author(s) |
So Hyun Baek, Seung-Hwan Lee, Yongbum Kwon, Kanghyuk Lee, Yoseb Song, Bum Sung Kim, Yong-Ho Choa, Da-Woon Jeong |
| On-Site Speaker (Planned) |
So Hyun Baek |
| Abstract Scope |
Rising lithium demand is exposing the limits of mining-based supply chains and shifting attention to unconventional aqueous resources such as desalination brine. However, the high concentrations of competing cations, particularly Na+ and Mg2+, make selective lithium recovery challenging. In this study, lithium-selective membranes based on the perovskite solid electrolyte Li0.33La0.56TiO3 (LLTO) were fabricated and sintered at temperatures between 1,200 and 1,400 °C. A sintering temperature of 1,300 °C provided an optimized balance between crystallinity and transport properties, enhancing ionic conductivity from 1×10-4 to 4×10-4 S/cm. The LLTO membrane sintered at 1,300 °C exhibited the highest performance in direct lithium extraction, achieving a Li+/Na+ selectivity of 59,000. These results demonstrate that microstructural engineering through sintering control is critical for designing selective and robust lithium-extraction membranes and suggest a pathway toward sustainable lithium recovery from hypersaline brines |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Extraction and Processing, Recycling and Secondary Recovery, |