Ultra−Selective and Capacious Lithium Extraction from Geothermal Brines via β−Diketone Functionalized Brush−Shaped Polymer

IF 18.5 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Advanced Functional Materials Pub Date : 2025-07-09 DOI:10.1002/adfm.202513012

Huiqin Hu, Guang Yang, Changli Chen, Xunsheng Guo, Yaohui Xie, Dechen Hou, Xiaomin Li, Wenhong Fan, Liming Yang, Xubiao Luo

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引用次数: 0

Abstract

The rapid rise of new energy vehicles and the energy storage industry drive a growing demand for direct and efficient lithium adsorption technologies to ensure sustainable lithium supply. Unfortunately, most reported lithium adsorption materials are ineffective for lithium extraction due to their unsatisfactory Li+ adsorption capacity. In this work, a β−diketone functionalized brush−shaped polymer (Cell−g−pDK) is proposed as a readily recoverable adsorption material demonstrating high Li+ adsorption performance (53.64 mg g−1), as well as exhibits excellent selectivity for Li+ (Kd = 257.74 mL g−1) from complex and low−concentration brine. This performance is attributed to the unique brush topology, which features strong steric repulsion between the polymer chains, increasing persistence length and reducing chain entanglement compared to linear polymer. Remarkably, this brush−shaped polymer adsorption material achieves nearly 100% lithium extraction efficiency within 45 min from actual geothermal brine (≤100 mg L−1, Li+), alongside a 717.35−fold lithium enrichment and over ten reuses. The proposed functionalized polymer with special topological architecture will promote the development of selective adsorption materials for resource extraction.

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β -二酮功能化刷状聚合物从地热盐水中超选择性大容量提取锂

新能源汽车和储能产业的快速崛起，推动了对直接高效锂吸附技术的需求不断增长，以确保锂的可持续供应。不幸的是，大多数报道的锂吸附材料由于Li+吸附能力不理想而无法有效提取锂。在这项工作中，β -二酮功能化的刷状聚合物（Cell - g - pDK）被提出作为一种易于回收的吸附材料，具有高的Li+吸附性能（53.64 mg g - 1），并且对复杂和低浓度盐水中的Li+ (Kd = 257.74 mL g - 1)具有良好的选择性。这种性能归因于独特的刷状拓扑结构，与线性聚合物相比，聚合物链之间具有强烈的空间排斥力，增加了持久长度并减少了链缠结。值得注意的是，这种刷状聚合物吸附材料在45分钟内从实际地热盐水（≤100 mg L−1,Li+）中获得了接近100%的锂提取效率，同时锂富集量达到717.35倍，重复利用次数超过10次。所提出的具有特殊拓扑结构的功能化聚合物将促进资源提取选择性吸附材料的发展。

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来源期刊

Advanced Functional Materials 工程技术-材料科学：综合

CiteScore

29.50

自引率

4.20%

发文量

2086

审稿时长

2.1 months

期刊介绍： Firmly established as a top-tier materials science journal, Advanced Functional Materials reports breakthrough research in all aspects of materials science, including nanotechnology, chemistry, physics, and biology every week. Advanced Functional Materials is known for its rapid and fair peer review, quality content, and high impact, making it the first choice of the international materials science community.