Extraction of lithium in salt lake brine through highly selective titanium ion sieves - A review

With the large-scale application and development of lithium-ion batteries, the extraction of lithium resources from salt lake brine has gradually become a global focus. Lithium titanium oxides (LTO)-type lithium ion-sieve (LIS) has attracted much attention due to its stable structure, high adsorption capacity, excellent recycling capacity, and environmental protection. In this review, we focused on the structure and adsorption mechanism of titanium-based ion sieves, and the preparation methods of different titanium oxide precursors. Furthermore, three modification methods including ion doping, morphology control, and surface coating were summarized. Finally, the insufficiency problem of current research is proposed, and the improvement and application of titanium-based LIS are prospected.