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Issue 5, 2021

Continuous electrical pumping membrane process for seawater lithium mining

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Abstract

Seawater contains significantly larger quantities of lithium than is found on land, thereby providing an almost unlimited resource of lithium for meeting the rapid growth in demand for lithium batteries. However, lithium extraction from seawater is exceptionally challenging because of its low concentration (∼0.1–0.2 ppm) and an abundance of interfering ions. Herein, we creatively employed a solid-state electrolyte membrane, and design a continuous electrically-driven membrane process, which successfully enriches lithium from seawater samples of the Red Sea by 43 000 times (i.e., from 0.21 to 9013.43 ppm) with a nominal Li/Mg selectivity >45 million. Lithium phosphate with a purity of 99.94% was precipitated directly from the enriched solution, thereby meeting the purity requirements for application in the lithium battery industry. Furthermore, a preliminary economic analysis shows that the process can be made profitable when coupled with the Chlor-alkali industry.

Graphical abstract: Continuous electrical pumping membrane process for seawater lithium mining

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Article information


Submitted
03 Feb 2021
Accepted
30 Mar 2021
First published
30 Mar 2021

This article is Open Access

Energy Environ. Sci., 2021,14, 3152-3159
Article type
Paper

Continuous electrical pumping membrane process for seawater lithium mining

Z. Li, C. Li, X. Liu, L. Cao, P. Li, R. Wei, X. Li, D. Guo, K. Huang and Z. Lai, Energy Environ. Sci., 2021, 14, 3152 DOI: 10.1039/D1EE00354B

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