About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Next Generation Electrometallurgical Technologies for Metal Extraction, Refining, and Recycling
|
| Presentation Title |
Engineering Transition Metal Oxide Electrode for Direct Lithium Extraction from Aqueous Brines |
| Author(s) |
Ankit Kumar Tripathi, Rahman Daiyan, Rose Amal |
| On-Site Speaker (Planned) |
Ankit Kumar Tripathi |
| Abstract Scope |
Mo-substituted LiMn₂O₄ (LMO) spinel cathodes were synthesized via a scalable solid-state route for electrochemical direct lithium extraction from aqueous brines. The optimized composition achieved 90% lithium recovery with a lithium uptake capacity of 5.1 mmol Li g⁻¹ h⁻¹, while Mn dissolution decreased from 6.8% for pristine LMO to 1.8% following Mo substitution. Enhanced lithium selectivity over Na⁺, K⁺, Mg²⁺, and Ca²⁺ was achieved under simulated brine conditions. In situ synchrotron powder diffraction (PD), X-ray absorption spectroscopy (XAS), and Raman spectroscopy revealed suppressed Jahn–Teller distortion, improved structural reversibility, and stabilized redox behaviour during lithium intercalation/deintercalation. Density functional theory (DFT) calculations showed that Mo substitution reduced lithium migration barriers and modified the electronic structure, consistent with the experimental observations. Integrated techno-economic analysis demonstrated that the enhanced electrode durability, recovery efficiency, and cycling stability significantly improved process economics, supporting the commercial deployment of electrochemical direct lithium extraction from complex aqueous brines. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Extraction and Processing, Electrometallurgy, Sustainability |