Lithium Extraction from Seawater through Pulsed Electrochemical Intercalation

被引：232

作者：

Liu, Chong ^{[1
,2
]}

Li, Yanbin ^{[1
]}

Lin, Dingchang ^{[1
]}

Hsu, Po-Chun ^{[3
,7
]}

Liu, Bofei ^{[1
]}

Yan, Gangbin ^{[2
]}

Wu, Tong ^{[1
]}

Cui, Yi ^{[1
,4
]}

Chu, Steven ^{[5
,6
]}

机构：

[1] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA

[2] Univ Chicago, Pritzker Sch Mol Engn, Chicago, IL 60637 USA

[3] Stanford Univ, Dept Mech Engn, Stanford, CA 94305 USA

[4] SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA

[5] Stanford Univ, Dept Phys, Stanford, CA 94305 USA

[6] Stanford Univ, Dept Mol & Cellular Physiol, Stanford, CA 94305 USA

[7] Duke Univ, Dept Mech Engn & Mat Sci, Durham, NC 27708 USA

来源：

JOULE | 2020年 / 4卷 / 07期

关键词：

ION BATTERIES; SODIUM-ION; RECOVERY; STABILITY; LIFEPO4; DIFFUSION; OXYGEN;

D O I：

10.1016/j.joule.2020.05.017

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

It is highly attractive to develop efficient methods to directly extract Li from seawater to secure the supply of Li. However, high concentration of Na in the seawater poses a great challenge in Li extraction. Here, we developed pulsed-rest and pulse-rest-reverse pulse-rest electrochemical intercalation methods with TiO2-coated FePO4 electrodes for Li extraction. The method can lower the intercalation overpotential and successfully boost the Li selectivity. Moreover, the pulse-rest-reverse pulse-rest method can also promote electrode crystal structure stability during the co-intercalation of Li and Na and prolong the lifetime of the electrode. We demonstrated 10 cycles of successful and stable Li extraction with 1:1 of Li to Na recovery from authentic seawater, which is equivalent to the selectivity of similar to 1.8 x 10(4). Also, with lake water of higher initial Li/Na ratio of 1.6 x 10(-3), we achieved Li extraction with more than 50:1 of Li to Na recovery.

引用

页码：1459 / 1469

页数：11

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