Enhancing Lithium extraction via ionic liquid coupled electrochemical methods - Details

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The　efficient　recovery　of　lithium　(Li+)　from　salt　lakes　has　become　a　pressing　issue　for　the　lithium　battery　industry.　In　this　study,　an　electrochemically　enhanced　extraction　system　with　industrialization　potential　was　developed,　which　increased　the　separation　efficiency　of　Li+　by　coupling　an　electric　field　with　ionic　liquid　extraction.　A　promising　1-butyl-3-methylimidazolium-2-thiophenecarbonyl　trifluoroacetone　([C4mim][TTA])　extraction　agent　was　developed.　Furthermore,　the　functionalized　ionic　liquid　(FIL)　was　dissolved　in　an　ionic　liquid　mixture　to　further　increase　its　extraction　capacity.　The　separation　performance　and　mechanisms　of　Li+　through　[C4mim][TTA]　liquid–liquid　extraction　were　investigated.　The　results　showed　that　within　a　pH　range　greater　than　2,　[C4mim][TTA]　had　a　very　high　separation　efficiency　for　Li+.　Additionally,　liquid–liquid　extraction　in　solutions　simulating　the　concentrations　of　Li+,　Na+,　and　K+　found　in　salt　lakes　revealed　very　high　Li+　separation　coefficients　of　βLi/K　=　3746　and　βLi/Na　=　1287.　Under　an　applied　electric　field　of　2.4　V,　the　electrochemically　enhanced　extraction　system　achieved　separation　coefficients　of　βLi/K　=　6678　and　βLi/Na　=　3068　within　2　h,　which　represent　the　highest　reported　values　to　date.　In　this　study,　a　novel　electrochemically　coupled　ionic　liquid　extraction　system　with　potential　for　industrialization　is　proposed.　©　2025　Elsevier　B.V.

Keyword：

Efficiency Electric fields Ionic liquids Lakes Lithium Lithium batteries Solvent extraction

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[ 1 ] [Lan, Xinyuan]College of Chemistry, Fuzhou University, Fuzhou; 350108, China
[ 2 ] [Lan, Xinyuan]Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou; 350002, China
[ 3 ] [Lan, Xinyuan]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen; 361021, China
[ 4 ] [Lan, Xinyuan]Fujian College, University of Chinese Academy of Sciences Fuzhou, Fujian, 350002, China
[ 5 ] [Liu, Rong]Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou; 350002, China
[ 6 ] [Liu, Rong]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen; 361021, China
[ 7 ] [Xue, Liyan]Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou; 350002, China
[ 8 ] [Xue, Liyan]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen; 361021, China
[ 9 ] [Xue, Liyan]Fujian Province Joint Innovation Key Laboratory of Fuel and Materials in Clean Nuclear Energy Systems, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou; 350002, China
[ 10 ] [Huang, Minzhong]Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou; 350002, China
[ 11 ] [Huang, Minzhong]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen; 361021, China
[ 12 ] [Xie, Meiying]Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou; 350002, China
[ 13 ] [Xie, Meiying]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen; 361021, China
[ 14 ] [Wang, Hongye]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen; 361021, China
[ 15 ] [Zhang, Hao]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen; 361021, China
[ 16 ] [Yang, Fan]Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou; 350002, China
[ 17 ] [Yang, Fan]Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials, Xiamen Institute of Rare Earth Materials, Chinese Academy of Sciences, Xiamen; 361021, China
[ 18 ] [Yang, Fan]Fujian Province Joint Innovation Key Laboratory of Fuel and Materials in Clean Nuclear Energy Systems, Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences, Fuzhou; 350002, China
[ 19 ] [Yang, Fan]Key Laboratory of Rare Earths, Chinese Academy of Sciences, and China Rare Earth Group Research Institute, Ganzhou; 341000, China
[ 20 ] [Yang, Fan]China Rare Earth Group Co., Ltd, Ganzhou; 341001, China

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Enhancing Lithium extraction via ionic liquid coupled electrochemical methods
2025，Hydrometallurgy

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Source ：

Hydrometallurgy

ISSN： 0304-386X

Year： 2025

Volume： 237

4 . 8 0 0

JCR@2023

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ESI Highly Cited Papers on the List： 0 Unfold All

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