文献类型：期刊文献

英文题名：Lattice engineering of Li1.6Mn1.6O4 adsorbent materials mitigates Jahn-Teller distortion for efficient and stable lithium extraction from brine

作者：Bao, Lu-Ri[1];Huang, Zhi Ai[1];Zang, Ling[1];Tang, Wei Ping[2];Sun, Shu-Ying[1]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake Re, Shanghai 200237, Peoples R China;[2]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Shanghai 200240, Peoples R China

年份：2026

卷号：529

外文期刊名：CHEMICAL ENGINEERING JOURNAL

收录：;EI(收录号：20260319911324);WOS:【SCI-EXPANDED(收录号:WOS:001673372900003)】；

基金：This work was supported by National Key Research and Development Program of China (2021YFC2902603), the Shanghai Synchrotron Radiation Facility (2024-SSRF-PT-507949), Key Research and Development and Transformation Program of Haixi Prefecture (2025-YZ-H04).

语种：英文

外文关键词：Lithium ion-sieves; Dual-doping; Manganese dissolution; Cycling stability

摘要：Spinel-type Li1.6Mn1.6O4 (LMO) has emerged as a highly promising adsorbent for lithium extraction from aqueous sources, owing to its high ion selectivity and cost-effectiveness. Nevertheless, its practical deployment is substantially limited by severe lattice distortion arising from the Jahn-Teller effect of Mn3+ during cycling. Herein, we introduce a lattice engineering strategy employing Zr/Ti dual-doping to enhance the structural stability of LMO. We find that the co-incorporated Zr4+ and Ti4+ ions act synergistically to alleviate Jahn-Teller distortion, strengthen the framework via enhanced metal-oxygen covalency, and promote Li+ diffusion through an expanded (111) interplanar spacing. The resultant adsorbent delivers high initial Li+ adsorption capacities of 37.80 mg g-1 and 44.24 mg g-1 from Qarhan (370 mg L-1) and Zabuye (728 mg L-1) brines, respectively, while suppressing Mn dissolution to 1.32% and 0.91%, respectively, after 10 adsorption-desorption cycles under real brine conditions. In-situ XRD and TEM analysis further verify that the dual-doping effectively inhibits the detrimental phase transition to cubic (Fd-3m) structure, therefore ensuring remarkable long-term structural stability. This work presents a viable pathway toward more efficient and sustainable lithium extraction from salt-lake brines.