Capacitive lithium capture system using a mixed LiMn2O4 and LiAlO2 material

Elmakki, T; Zavahir, S; Shon, HK; Gago, GH; Park, H; Han, DS

Capacitive lithium capture system using a mixed LiMn2O4 and LiAlO2 material

Elmakki, T Zavahir, S Shon, HK Gago, GH Park, H Han, DS

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Publisher:: ELSEVIER
Publication Type:: Journal Article
Citation:: Desalination, 2025, 593
Issue Date:: 2025-01-05

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Field	Value	Language
dc.contributor.author	Elmakki, T
dc.contributor.author	Zavahir, S
dc.contributor.author	Shon, HK
dc.contributor.author	Gago, GH
dc.contributor.author	Park, H
dc.contributor.author	Han, DS
dc.date.accessioned	2025-07-16T05:17:17Z
dc.date.available	2025-07-16T05:17:17Z
dc.date.issued	2025-01-05
dc.identifier.citation	Desalination, 2025, 593
dc.identifier.issn	0011-9164
dc.identifier.issn	1873-4464
dc.identifier.uri	http://hdl.handle.net/10453/188432
dc.description.abstract	The increasing demand for lithium (Li), a crucial material in various industries, requires efficient recovery methods and a shift toward a circular economy. This study investigates a fast, eco-friendly technique for selective Li recovery, emphasizing the use of innovative materials from spent Li-ion batteries (SLiBs), particularly LiMn<inf>2</inf>O<inf>4</inf>(LMO)/LiAlO<inf>2</inf>(LAO)-based materials, to enhance Li's circular economy. Conventional Li recovery methods typically involve prolonged processes with chemical additives and environmental concerns, whereas electrochemical systems like membrane-based capacitive deionization (MCDI) offer promising high removal capacities, regeneration ability, and scalability. However, no commercial electrochemical Li recovery system underscores the need for continued research to improve their performance. This study employs MCDI for selective Li recovery, examining various electrode materials, including commercial activated carbon, LMO-based electrodes, and modified LMO/LAO-based electrodes. The mixed LiMn<inf>2</inf>O<inf>4</inf>/LiAlO<inf>2</inf> cathode exhibited high selectivity for Li<sup>+</sup> extraction with a recovery efficiency of 83.1 %, achieving a deionization capacity of 38.15 mg/g at 1.0 V under an initial feed concentration of 5 mM LiCl. The Li<sup>+</sup> adsorption reached 900 μmol/g, with a separation factor (α<inf>Mg<sup>2+</sup></inf><sup>Li<sup>+</sup></sup>) of 3.77 (C<inf>Mg</inf><sup>2+</sup>/C<inf>Li</inf><sup>+</sup> = 1), setting a robust foundation for a comprehensive Li recovery framework that meets the increasing Li demand while minimizing environmental impact.
dc.language	English
dc.publisher	ELSEVIER
dc.relation	http://purl.org/au-research/grants/arc/IH210100001
dc.relation	http://purl.org/au-research/grants/arc/DP230100238
dc.relation	Qatar National Research FundGSRA8-L-2-0414-21012
dc.relation	NPRP12S-0227-190166
dc.relation	Qatar National Research FundNPRP12S-0227-190166
dc.relation.ispartof	Desalination
dc.relation.isbasedon	10.1016/j.desal.2024.118195
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	03 Chemical Sciences, 09 Engineering
dc.subject.classification	Chemical Engineering
dc.subject.classification	34 Chemical sciences
dc.subject.classification	40 Engineering
dc.title	Capacitive lithium capture system using a mixed LiMn2O4 and LiAlO2 material
dc.type	Journal Article
utslib.citation.volume	593
utslib.for	03 Chemical Sciences
utslib.for	09 Engineering
pubs.organisational-group	University of Technology Sydney
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology
pubs.organisational-group	University of Technology Sydney/Faculty of Engineering and Information Technology/School of Civil and Environmental Engineering
pubs.organisational-group	University of Technology Sydney/UTS Groups
pubs.organisational-group	University of Technology Sydney/UTS Groups/Centre for Technology in Water and Wastewater (CTWW)
utslib.copyright.status	open_access	*
dc.rights.license	This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). To view a copy of this license, visit https://creativecommons.org/licenses/by/4.0/
dc.date.updated	2025-07-16T05:16:57Z
pubs.publication-status	Published
pubs.volume	593

Abstract:

The increasing demand for lithium (Li), a crucial material in various industries, requires efficient recovery methods and a shift toward a circular economy. This study investigates a fast, eco-friendly technique for selective Li recovery, emphasizing the use of innovative materials from spent Li-ion batteries (SLiBs), particularly LiMn2O4(LMO)/LiAlO2(LAO)-based materials, to enhance Li's circular economy. Conventional Li recovery methods typically involve prolonged processes with chemical additives and environmental concerns, whereas electrochemical systems like membrane-based capacitive deionization (MCDI) offer promising high removal capacities, regeneration ability, and scalability. However, no commercial electrochemical Li recovery system underscores the need for continued research to improve their performance. This study employs MCDI for selective Li recovery, examining various electrode materials, including commercial activated carbon, LMO-based electrodes, and modified LMO/LAO-based electrodes. The mixed LiMn2O4/LiAlO2 cathode exhibited high selectivity for Li⁺ extraction with a recovery efficiency of 83.1 %, achieving a deionization capacity of 38.15 mg/g at 1.0 V under an initial feed concentration of 5 mM LiCl. The Li⁺ adsorption reached 900 μmol/g, with a separation factor (αMg²⁺^Li⁺) of 3.77 (CMg²⁺/CLi⁺ = 1), setting a robust foundation for a comprehensive Li recovery framework that meets the increasing Li demand while minimizing environmental impact.

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http://hdl.handle.net/10453/188432