(301c) Enhanced Lithium Recovery through Innovative 2D Nanocomposites and Membrane Technologies: A Pathway to Sustainability

Given the growing need for lithium due to its essential role in electric vehicles and renewable energy storage, our study addresses the crucial task of effectively extracting lithium from a variety of water sources, including brines, wastewater, and seawater. Our aim is to promote a more eco-friendly life cycle for lithium-ion batteries through the introduction of innovative technological solutions, focusing on adsorption and membrane-based separation methods.

Our research highlights the use of two-dimensional (2D) nanocomposite materials known for their remarkable ability to selectively and efficiently capture lithium ions. We have developed a pioneering adsorbent composed of sulfonated graphene oxide, MXene, ionic liquid, and alginate, which showcases superior lithium adsorption and removal capabilities, achieving more than 89% efficiency in lithium ion removal.

In parallel, we explore the potential of membrane-based separation as an environmentally friendly alternative for lithium extraction. We present a new type of membrane made from vertically aligned, functionalized transition metal carbides and nitrides (MXene). These membranes stand out for their fast lithium ion transport and ability to effectively separate lithium ions from other ions, based on their size and different affinities. Our modified membranes have shown exceptional performance, with a Li+/Mg2+ selectivity ratio exceeding 104, far outperforming conventional membranes, and achieving over 94% rejection of MgCl2.

By combining 2D nanocomposite adsorption with advanced membrane separation technology, we offer a comprehensive solution for lithium recovery. Implementing these advanced technologies not only reduces the environmental impact of lithium mining but also advances lithium recovery techniques. This approach strengthens the sustainability of the lithium-ion battery industry, ensuring its future in light of limited lithium resources and growing environmental concerns.