Lithium extraction from brine through a decoupled and membrane-free electrochemical cell design

IF 44.7 1区综合性期刊 Q1 MULTIDISCIPLINARY SCIENCES

Science Pub Date : 2024-09-26 DOI:10.1126/science.adg8487

Zhen Li, I-Chun Chen, Li Cao, Xiaowei Liu, Kuo-Wei Huang, Zhiping Lai

引用次数: 0

Abstract

The sustainability of lithium-based energy storage or conversion systems, e.g., lithium-ion batteries, can be enhanced by establishing methods of efficient lithium extraction from harsh brines. In this work, we describe a decoupled membrane-free electrochemical cell that cycles lithium ions between iron-phosphate electrodes and features cathode (brine) and anode (fresh water) compartments that are isolated from each other yet electrochemically connected through a pair of silver/silver-halide redox electrodes. This design is compatible with harsh brines having magnesium/lithium molar ratios of up to 3258 and lithium concentrations down to 0.15 millimolar, enabling the production of battery-grade (>99.95% pure) lithium carbonate. Energy savings of up to ~21.5% were realized by efficiently harvesting the osmotic energy of the brines. A pilot-scale cell with an electrode surface area of 33.75 square meters was used to realize lithium extraction from Dead Sea brine with a recovery rate of 84.0%.

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通过去耦合无膜电化学电池设计从卤水中提取锂

通过建立从苛刻盐水中高效提取锂的方法，可以提高锂基能源存储或转换系统（如锂离子电池）的可持续性。在这项研究中，我们介绍了一种无膜解耦电化学电池，该电池在磷酸铁电极之间循环锂离子，其阴极（盐水）和阳极（淡水）相互隔离，但通过一对银/卤化银氧化还原电极进行电化学连接。这种设计适用于镁/锂摩尔比高达 3258、锂浓度低至 0.15 毫摩尔的苛刻盐水，能够生产电池级（纯度 99.95%）碳酸锂。通过有效利用盐水的渗透能，可节省高达 21.5%的能源。电极表面积为 33.75 平方米的中试规模电池实现了从死海盐水中提取锂，回收率达 84.0%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Science 综合性期刊-综合性期刊

CiteScore

61.10

自引率

0.90%

发文量

审稿时长

2.1 months

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