Continuous electrical pumping membrane process for seawater lithium mining

Zhen Li, Chunyang Li, Xiaowei Liu, Li Cao, Peipei Li, Ruicong Wei, Xiang Li, Dong Guo, Kuo-Wei Huang, Zhiping Lai

Research output: Contribution to journalArticlepeer-review

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.
Original languageEnglish (US)
Pages (from-to)3152-3159
Number of pages8
JournalEnergy and Environmental Science
Volume14
Issue number5
DOIs
StatePublished - 2021

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