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Adv."],"published-print":{"date-parts":[[2026,4,17]]},"abstract":"<jats:p>\n                    The rapidly growing demand for lithium in energy storage technologies necessitates more efficient lithium extraction methods from salt lakes. Direct lithium extraction (DLE) has gained attention, as it addresses more than 50% lithium losses in traditional salt-pond\u2013based processes. However, separating lithium ion from sodium ion or potassium ion remains challenging due to their similar charge and hydration radii. To overcome this, we developed a covalent organic framework\u2013based ion trap membrane by embedding lithiophilic diketone molecules [2-thenoyltrifluoroacetone (HTTA)] into subnanometer channels, enabling a \u201cbind-jump\u201d transport mechanism. HTTA sites selectively bind lithium ion, assist its partial dehydration (bind step), and promote hopping to adjacent HTTA sites (jump step). The optimized HTTA\n                    <jats:sub>1<\/jats:sub>\n                    \u20131,3,5-triformylphloroglucinol\u2013tris(4-aminophenyl)amine\/polyacrylonitrile membrane exhibited high lithium ion\/sodium ion selectivity (&gt;320) and lithium ion permeance (~143 millimoles per square meter per hour) under electrodialysis, outperforming leading membranes. The membrane also showed stable performance over 10 cycles. This work demonstrates a scalable strategy combining thermodynamic and kinetic modulation for efficient lithium ion extraction from complex brines.\n                  <\/jats:p>","DOI":"10.1126\/sciadv.aea5077","type":"journal-article","created":{"date-parts":[[2026,4,15]],"date-time":"2026-04-15T17:58:57Z","timestamp":1776275937000},"update-policy":"https:\/\/doi.org\/10.34133\/aaas_crossmark","source":"Crossref","is-referenced-by-count":9,"title":["Ion trap membrane with confined bind-jump strategy for high-efficiency direct lithium extraction"],"prefix":"10.1126","volume":"12","author":[{"ORCID":"https:\/\/orcid.org\/0009-0005-5487-4277","authenticated-orcid":true,"given":"Yaqian","family":"Du","sequence":"first","affiliation":[{"name":"Key Laboratory of Green and High-end Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Qinghai Provincial Key Laboratory of Resources and Chemistry of Salt Lakes, Chinese Academy of Sciences, Xining, Qinghai 810008, 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