Electrochemically switched ion exchange device with serpentine flow field for selective extraction of lithium

被引：0
|
作者：
Zhang Z. [1 ]
He Y. [2 ]
Sun H. [2 ]
Zhang R. [2 ]
Sun Z. [2 ]
Chen J. [2 ]
Zheng Y. [1 ]
Du X. [1 ]
Hao X. [1 ]
机构：
[1] College of Chemical Engineering and Technology, Taiyuan University of Technology, Shanxi, Taiyuan
[2] Academia Sinica, Qinghai Salt Lake Industry Group Company Limited, Geermu, Qinghai
来源：
Huagong Xuebao/CIESC Journal | 2023年 / 74卷 / 05期
关键词：
electrochemistry; lithium extraction; salt lake brine; selectivity; separation; serpentine flow field;
D O I：
10.11949/0438-1157.20230303
中图分类号：
学科分类号：
摘要：
An electrochemically switched ion exchange (ESIX) device with single-channel serpentine flow field was assembled by alternately and symmetrically stacking perforated LiMn2O4-based and carbon black (C)-based film coated electrodes, and employed for selective extraction of lithium from simulated brine with high Mg/Li ratio (about 500). Based on this bottom-up serpentine flow field, increasing the number of chambers in the membrane module can enable more lithium ions to be trapped in the simulated brine. Compared with the conventional driving mode of constant voltage, the collaborative driving mode of constant current-constant voltage could effectively improve the lithium extraction performance of the ESIX device. The extraction efficiency of Li+reached as high as 97.6% in 120 min with a coupled driving mode of 0.8 mA·cm-2-1 V. In addition, X-ray diffraction (XRD) test demonstrated that most of the adsorbed Mg2+ could be removed by rinsing the surface of the film coated electrodes. Therefore, such a novel ESIX device has potential industrial applications for selective separation of lithium from high Mg/Li ratio salt lake brines. © 2023 Chemical Industry Press. All rights reserved.
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页码：2022 / 2033
页数：11
相关论文
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