M, Vignesh Garnet-Polymer Composite Membrane for Electrochemical Lithium Extraction. In: Conference on Applied Membrane Technology and Translational Research (AMTTR 2025), 3-4 March 2025, VMCC IIT Bombay. (Submitted)

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Abstract

Introduction: The rising demand for lithium, a strategic metal for lithium-ion batteries, necessitates sustainable extraction methods with reduced environmental impact. This study explores membrane-assisted electrochemical technique to address the limitations of traditional lithium recovery processes. Methodology: Ga-doped LLZO (Li6.25La3Ga0.25Zr2O12) was synthesized using the combustion method. PVdF-HFP polymer membranes and PVdF-HFP/Ga-LLZO polymer nanocomposite membranes were fabricated by casting method. The physicochemical properties of the prepared materials.The physicochemical properties of the synthesized Ga-doped LLZO and polymer membranes were analyzed. Lithium extraction performance of the prepared membranes was evaluated using an electrochemical cell. Results and Discussion: The X-ray diffractograms of Ga-doped LLZO show all major peaks indexed to cubic LLZO (c-LLZO), confirming its successful synthesis. Minor impurities, such as La(OH)₃, were also detected. The PVdF-HFP diffraction pattern exhibits characteristic peaks, indicating its semi-crystalline nature.Upon the incorporation of Ga-LLZO nanoparticles, a successive decrease in peak intensity and gradual broadening of the characteristic peak was observed. This behavior signifies a reduction in the crystallinity of PVdF-HFP, which can be attributed to the interaction of nanoparticles with the polymer matrix. Such interactions disrupt the polymer chain organization, leading to enhanced interchain hopping of lithium ions, thereby improving ionic conductivity.Lithium extraction assessments revealed that the PVdF-HFP/Ga-LLZO nanocomposite membranes exhibited higher efficiency compared to pristine PVdF-HFP membranes. This improved performance can be linked to the synergistic effects of the Ga-LLZO nanoparticles, which enhance ionic pathways and contribute to better electrochemical properties. Conclusion:The obtained results highlight the potential of such membranes for sustainable lithium recovery via electrochemical processes.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	Garnet, Polymer Membrane, Nanocomposite, Electrochemical Separation, Direct Lithium Extraction
Subjects:	Engineering Materials
Divisions:	Ceramic Membrane
Depositing User:	Ms Upasana Sahu
Date Deposited:	01 Sep 2025 11:27
Last Modified:	01 Sep 2025 11:27
URI:	http://cgcri.csircentral.net/id/eprint/5739

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