Yang Liming, Tu Yunyun, Li Hongyu, Zhan Wanli, Hu Huiqin, Wei Yun, Chen Changli, Liu Ketao, Shao Penghui, Li Min, Yang Guang, Luo Xubiao
National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization, Nanchang Hangkong University, Nanchang, 330063, China.
Biomass Molecular Engineering Center and Anhui Provincial Key Laboratory of Microbial Pest Control, Anhui Agricultural University, Hefei, 230036, China.
Angew Chem Int Ed Engl. 2023 Sep 18;62(38):e202308702. doi: 10.1002/anie.202308702. Epub 2023 Aug 8.
Extraction and recovery of lithium from reserves play a critical role in the sustainable development of energy due to the explosive growth of the lithium-battery market. However, the low efficiency of extraction and recovery seriously threatens the sustainability of lithium supply. In this contribution, we fabricate a novel mechanically robust fluorine-rich hydrogel, showing highly efficient Li extraction from Li-containing solutions. The hydrogel was facilely fabricated by simple one-pot polymerization of supramolecular nanosheets of fluorinated monomers, acrylic acid and a small amount of chemical crosslinkers. The hydrogel exhibits a remarkable lithium adsorption capacity (Q Li =122.3 mg g ) and can be reused. Moreover, it can exclusively extract lithium ions from multiple co-existing metal ions. Notably, the separation of Li /Na in actual wastewater is achieved with a surprising separation factor of 153.72. The detailed characterizations as well as calculation showed that the specific coordination of Li-F plays a central role for both of the striking recovery capability and selectivity for Li . Furthermore, an artificial device was constructed, displaying high efficiency of extracting lithium in various complex actual lithium-containing wastewater. This work provides a new and promising avenue for the efficient extraction and recovery of lithium resource from complex lithium-containing solutions.
由于锂电池市场的爆发式增长，从锂矿中提取和回收锂在能源可持续发展中起着关键作用。然而，提取和回收效率低下严重威胁着锂供应的可持续性。在本研究中，我们制备了一种新型的机械坚固的富氟水凝胶，其对含锂溶液具有高效的锂提取能力。该水凝胶通过氟化单体、丙烯酸的超分子纳米片与少量化学交联剂的简单一锅法聚合轻松制备而成。该水凝胶表现出显著的锂吸附容量（Q Li =122.3 mg g ）且可重复使用。此外，它能够从多种共存金属离子中选择性地提取锂离子。值得注意的是，在实际废水中实现了Li⁺/Na⁺的分离，分离因子高达153.72。详细的表征和计算表明，Li-F的特定配位对于出色的锂回收能力和对Li⁺的选择性均起着核心作用。此外，构建了一种人工装置，其在各种复杂的实际含锂废水中均显示出高效的锂提取能力。这项工作为从复杂含锂溶液中高效提取和回收锂资源提供了一条新的、有前景的途径。
