Restraining Lattice Distortion of LiMn2O4 Facilitates Fluidic Electrochemical Lithium Extraction from Seawater

IF 9.1 1区材料科学 Q1 CHEMISTRY, MULTIDISCIPLINARY Nano Letters Pub Date : 2025-01-08 DOI:10.1021/acs.nanolett.4c04330

Yongtai Xu, Yixiang Li, Xiaoyu Zhao, Yifan Li, Xue Liang Li, Jing Wang, Hui Ying Yang

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Abstract

Reversible electrochemical extraction using cathode materials shows great potential for selective lithium extraction from low-concentration aqueous sources. However, ion selectivity and structural distortion challenges have limited its application to sources like seawater. Here, we synthesize Nb-modified LiMn₂O₄ using a simple wet chemistry coating method, introducing minimal structural defects in the LiMn₂O₄ materials and enhancing stability with a LiNbO₃ coating to limit lattice expansion. Additionally, operando XRD reveals reduced lattice distortion during Li⁺ intercalation/deintercalation. Electrochemical tests show that the composite achieves high stability (over 100 cycles), fast Li⁺ electrosorption, and robust ion selectivity. Furthermore, utilizing a fluidic electrochemical approach, we extract lithium from simulated seawater (3.5 ppm of Li⁺), achieving an absorption capacity of 13.8 mg g^–1 and an energy consumption of 9.96 Wh g^–1.

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抑制LiMn2O4晶格畸变有利于流体电化学从海水中提取锂

正极材料可逆电化学萃取在低浓度水溶液中选择性提取锂方面显示出巨大的潜力。然而，离子选择性和结构畸变的挑战限制了其在海水等来源的应用。本文采用一种简单的湿化学涂层方法合成了铌修饰的LiMn2O4，在LiMn2O4材料中引入了最小的结构缺陷，并通过LiNbO3涂层来限制晶格膨胀，从而提高了LiMn2O4的稳定性。此外，operando XRD显示Li+插入/脱嵌过程中晶格畸变减少。电化学测试表明，该复合材料具有高稳定性（超过100次循环），快速的Li+电吸附和强大的离子选择性。此外，我们利用流体电化学方法从模拟海水（3.5 ppm Li+）中提取锂，实现了13.8 mg g-1的吸收容量和9.96 Wh g-1的能耗。

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来源期刊

Nano Letters 工程技术-材料科学：综合

CiteScore

16.80

自引率

2.80%

发文量

1182

审稿时长

1.4 months

期刊介绍： Nano Letters serves as a dynamic platform for promptly disseminating original results in fundamental, applied, and emerging research across all facets of nanoscience and nanotechnology. A pivotal criterion for inclusion within Nano Letters is the convergence of at least two different areas or disciplines, ensuring a rich interdisciplinary scope. The journal is dedicated to fostering exploration in diverse areas, including: - Experimental and theoretical findings on physical, chemical, and biological phenomena at the nanoscale - Synthesis, characterization, and processing of organic, inorganic, polymer, and hybrid nanomaterials through physical, chemical, and biological methodologies - Modeling and simulation of synthetic, assembly, and interaction processes - Realization of integrated nanostructures and nano-engineered devices exhibiting advanced performance - Applications of nanoscale materials in living and environmental systems Nano Letters is committed to advancing and showcasing groundbreaking research that intersects various domains, fostering innovation and collaboration in the ever-evolving field of nanoscience and nanotechnology.