文献类型：期刊文献

英文题名：Selective membrane capacitive deionization for superior lithium recovery

作者：Si, Jiangju[1,2];Xue, Chenrui[1];Li, Shun[1];Yang, Linchao[1];Li, Weiwei[1,2];Yang, Jie[1,2];Lan, Jihong[1];Sun, Ningbo[1,2]

第一作者：Si, Jiangju

通讯作者：Lan, JH[1];Sun, NB[1]

机构：[1]Xinxiang Univ, Sch Chem & Mat Engn, Xinxiang 453003, Henan, Peoples R China;[2]Henan Photoelectrocatalyt Mat & Micronano Applicat, Xinxiang 453003, Henan, Peoples R China

第一机构：新乡学院

通讯机构：[1]corresponding author), Xinxiang Univ, Sch Chem & Mat Engn, Xinxiang 453003, Henan, Peoples R China.|[11071]新乡学院;

年份：2024

卷号：572

外文期刊名：DESALINATION

收录：;EI(收录号：20234815107019);Scopus(收录号：2-s2.0-85178287643);WOS:【SCI-EXPANDED(收录号:WOS:001125555700001)】；

基金：We sincerely acknowledge the support of the National Natural Sci- ence Foundation of China (No. 51901201, 52001270, 51801171) , Key Scientific Research Project Plans of Higher Education Institutions in Henan Province (No. 20B430015) , and Science and Technology Research Program of Henan Province (No. 202102210232) .

语种：英文

外文关键词：Lithium recovery from brine; Selective membrane capacitive deionization; delta-MnO2 with oxygen vacancies; Porous carbon; Lithium recovery capacity

摘要：To meet the huge demand of global lithium resources, it is urgent and challenging to develop a new efficient technology for lithium recovery from salt-lake brines. Here, we report a selective membrane capacitive deionization (sMCDI) system for the lithium recovery. Benefit from delta-MnO2-x@CNTs with efficient intercalated pseudo-capacitance and porous carbon with a specific area of 2989.2 m(2) g(-1), a high lithium recovery capacity of 43.0 mg g(-1) is achieved in LiCl solution at 1.2 V, and the corresponding lithium recovery rate is 5.17 mg g(-1) min(-1). A modified Nafion (R) 212 membrane with thin LiMn2O4 coating is for the selective Li+ recovery. A much higher Li+/Mg2+ selectivity of sMCDI cell can be accomplished for dehydration by increasing the concentration of Li+ and Mg2+ in feed solution. When the concentration of Li and Mg in feed solution increases to 2420 and 26,487 mg L-1 (the Mg/Li mass ratio = 10.9), the Li+ and Mg2+ recovery capacity can reach 121.3 and 204.6 mg g(-1), respectively, and the Mg/Li mass ratio decreases to 2.33 in recovery solution. These investigations expand the selection range of the available CDI electrode candidates, and offer the prospect of the sMCDI technology for the efficient lithium recovery from brines.