文献类型：期刊文献

英文题名：Revealing the functional relationship between manganese dissolution potentials and lithium concentrations with diffusion coefficient for lithium intercalation in λ-MnO 2 electrode

作者：Wang, Penglin[1,2,3];Zhou, Shiyu[1,2,3];Yao, Xiao[4];Fu, Yu[4];Gu, Shuai[1,2,3];Yu, Jianguo[1,2,3]

机构：[1]East China Univ Sci & Technol, Natl Engn Res Ctr Integrated Utilizat Salt Lake Re, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Engn Res Ctr Salt Lake Resources Proc Engn, Minist Educ, Shanghai 200237, Peoples R China;[3]East China Univ Sci & Technol, Joint Lab Potassium & Lithium Strateg Resources, Shanghai 200237, Peoples R China;[4]East China Univ Sci & Technol, Sch Chem Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：357

外文期刊名：SEPARATION AND PURIFICATION TECHNOLOGY

收录：;EI(收录号：20244317250657);WOS:【SCI-EXPANDED(收录号:WOS:001342381300001)】；

基金：This work was supported by the Nature Science Foundation of Shanghai [grant number 22ZR1415800] , and the National Natural Sci-ence Foundation of China [grant number 52304422] .

语种：英文

外文关键词：Electrochemical redox lithium extraction; Manganese dissolution; Low lithium concentration; Concentration polarization

摘要：Electrochemical redox lithium extraction (ELE) with LiMn2O4/7-MnO2 redox couple, stands out as the most prospective technology for efficient and selective lithium extraction from the salt lake brines owing to the high lithium intercalation capacity, selectivity, and recovery rate. However, the decreasing Li+ concentration induced electrode polarization, especially, at low concentrations, and inappropriately applied potentials can significantly accelerate manganese dissolution (MD). While no correlational research has established the relationship between the manganese dissolution potential (EMD) and Li+ concentration gradient. Herein, the inversely proportional relationship between E MD and the lithium concentration is first revealed through steady-state diffusion coefficients. This research sheds light on the MD mechanism at different lithium concentration gradients and lays the foundation for the industrial application of electrochemical lithium extraction with LiMn2O4/7-MnO2 redox couple from salt lake brines.