Continuous flow extraction of lithium from brine using silica-coated LMO beads

IF 5.2 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materials Advances Pub Date : 2025-02-27 DOI:10.1039/D4MA01100G

Jialun Su, Qiyue Fan, Xiangting Hu, Yue Sun, Jie Lin, Jiayue Xu, Bingcai Pan and Zhenda Lu

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Abstract

The increasing demand for lithium-ion batteries in the electric vehicle market has intensified the demand for efficient lithium extraction from salt lake brine. This study presents a novel approach using silica-coated lithium manganese oxide (LMO) adsorbents embedded in millimeter-sized sodium alginate (SA) beads (LMO@SiO₂/SA beads). By replacing expensive and environmentally detrimental tetraethyl orthosilicate (TEOS) with low-cost, eco-friendly sodium metasilicate (Na₂SiO₃), we have developed a more sustainable and cost-effective lithium extraction method. Continuous flow adsorption–desorption experiments demonstrated the excellent performance of the LMO@SiO₂/SA beads, maintaining a lithium adsorption capacity of 6.22 mg g⁻¹ and a consistent manganese dissolution ratio of 1.26% per cycle after 50 cycles. These results highlight the potential of this approach for large-scale lithium extraction from salt lakes, providing a sustainable and economical option to support the growing electric vehicle industry.

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用硅包覆LMO微珠连续流萃取卤水中的锂

随着电动汽车市场对锂离子电池需求的不断增长，对盐湖卤水高效提锂的需求也随之加剧。本研究提出了一种新的方法，将二氧化硅包覆的锂锰氧化物（LMO）吸附剂嵌入毫米大小的海藻酸钠（SA）珠（LMO@SiO2/SA珠）中。通过用低成本、环保的偏硅酸钠（Na2SiO3）取代昂贵且对环境有害的正硅酸四乙酯（TEOS），我们开发了一种更具可持续性和成本效益的锂提取方法。连续流动吸附-解吸实验表明，LMO@SiO2/SA珠粒性能优异，循环50次后，锂吸附量保持在6.22 mg g−1，锰溶解率保持在1.26%。这些结果突出了这种方法从盐湖中大规模提取锂的潜力，为支持不断增长的电动汽车行业提供了可持续和经济的选择。

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