{"title":"揭示λ-MnO2 电极中锂插层的锰溶解电位和锂浓度与扩散系数之间的函数关系","authors":"Penglin Wang, Shiyu Zhou, Xiao Yao, Yu Fu, Shuai Gu, Jianguo Yu","doi":"10.1016/j.seppur.2024.130184","DOIUrl":null,"url":null,"abstract":"Electrochemical redox lithium extraction (ELE) with LiMn<sub>2</sub>O<sub>4</sub>/<em>λ</em>-MnO<sub>2</sub> 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<sup>+</sup> 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 (<em>E<sub>MD</sub></em>) and Li<sup>+</sup> concentration gradient. Herein, the inversely proportional relationship between <em>E<sub>MD</sub></em> 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 LiMn<sub>2</sub>O<sub>4</sub>/<em>λ</em>-MnO<sub>2</sub> redox couple from salt lake brines.","PeriodicalId":427,"journal":{"name":"Separation and Purification Technology","volume":null,"pages":null},"PeriodicalIF":8.1000,"publicationDate":"2024-10-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Revealing the functional relationship between manganese dissolution potentials and lithium concentrations with diffusion coefficient for lithium intercalation in λ-MnO2 electrode\",\"authors\":\"Penglin Wang, Shiyu Zhou, Xiao Yao, Yu Fu, Shuai Gu, Jianguo Yu\",\"doi\":\"10.1016/j.seppur.2024.130184\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Electrochemical redox lithium extraction (ELE) with LiMn<sub>2</sub>O<sub>4</sub>/<em>λ</em>-MnO<sub>2</sub> 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<sup>+</sup> 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 (<em>E<sub>MD</sub></em>) and Li<sup>+</sup> concentration gradient. Herein, the inversely proportional relationship between <em>E<sub>MD</sub></em> 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 LiMn<sub>2</sub>O<sub>4</sub>/<em>λ</em>-MnO<sub>2</sub> redox couple from salt lake brines.\",\"PeriodicalId\":427,\"journal\":{\"name\":\"Separation and Purification Technology\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":8.1000,\"publicationDate\":\"2024-10-20\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Separation and Purification Technology\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1016/j.seppur.2024.130184\",\"RegionNum\":1,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q1\",\"JCRName\":\"ENGINEERING, CHEMICAL\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Separation and Purification Technology","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1016/j.seppur.2024.130184","RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Revealing the functional relationship between manganese dissolution potentials and lithium concentrations with diffusion coefficient for lithium intercalation in λ-MnO2 electrode
Electrochemical redox lithium extraction (ELE) with LiMn2O4/λ-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 EMD 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/λ-MnO2 redox couple from salt lake brines.
期刊介绍:
Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.