Progress of Research in Titanium-Based Lithium-Ion Sieves for the Extraction of Lithium from Salt Lake Brine

The lithium resource is a crucial national strategic asset, and China's salt lakes are abundant in lithium. Efficient extraction of lithium from these salt lakes holds immense significance. Among the various methods available for the extraction of lithium from salt lakes, the adsorption method stands out due to its high selectivity, economic viability, and advanced process maturity. The key lies in developing high-performance adsorption materials, with lithium titanium oxide (LTO)-type lithium-ion sieves (LIS) being considered promising candidates. Therefore, we have concentrated on the structure and adsorption mechanism of titanium-based ion sieves and the preparation methods of different titanium oxide precursors in this review. Moreover, two modification methods, i.e., ion doping and surface coating, are discussed. Lastly, the insufficiency of current research is proposed, and the optimization and application of titanium-based LIS are prospected.