气候变化领域集成服务门户(CCPortal): Highly selective lithium extraction from salt lake via carbon-coated lithium vanadium phosphate capacitive electrode

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DOI	10.1016/j.cej.2024.148985
	Highly selective lithium extraction from salt lake via carbon-coated lithium vanadium phosphate capacitive electrode
	Zhou, Jianguo; Xiang, Shuhong; Wang, Xinyu; Shin, Dong-Myeong; Zhou, Hongjian
发表日期	2024
ISSN	1385-8947
EISSN	1873-3212
起始页码	482
卷号	482
英文摘要	Recently, with the rapid development of lithium -ion batteries and electric vehicles, the demand for lithium resources in the world has undoubtedly greatly intensified. Based on the advantages of high selectivity and low energy consumption, capacitive deionization (CDI) technology is well-suited for the selective extraction of lithium resources from salt lakes. Herein, carbon-coated Li3V2(PO4)3 (LVP@C) is developed as a cathode electrode for the first time by using a hybrid CDI device to selectively extract Li+ ions from salt lake brine, due to its high theoretical capacity and excellent cycling capacity. The electrochemical (de)intercalation mechanism of Li+ ions in the LVP@C has been evaluated by electrochemical, X-ray photoelectron spectroscopy (XPS), and in -situ Xray diffraction (XRD) techniques, demonstrating a reversible transition of the V valence state during electrosorption/desorption based on Faradaic redox reaction. The optimized LVP@2C delivers a maximum Li+ electrosorption capacity of 25.8 mg g-1, and still maintains a high retention of 78 % even after 50 cycles. The LVP@2C has lithium selectivity coefficients of 444.7 and 351.2 at high Mg -Li ratios of 1:5 and high Na -Li ratios of 1:15. Density Functional Theory (DFT) calculations further reveal that the selective electrosorption mechanism in the LVP@2C electrode is mostly ascribed to the smaller hydrated ionic radius and lower ionic diffusion energy barrier of Li+ ions in comparison with Mg2+ ions. Finally, the effectiveness evaluation of the lithium selective extraction from the brine of a natural salt lake in Tibet indicates that the LVP@2C has highly selective electrosorption of lithium (alpha(Li/Mg) = 187.50, alpha(Li/K) = 136.11, alpha(Li/Na) = 116.88, alpha(Li/Ca) = 4.92) and can serve as a potential electrode for the extraction of lithium from salt lake brine.
英文关键词	Capacitive deionization; Selective electrosorption; Lithium extraction from salt lake; Lithium ion intercalation
语种	英语
WOS研究方向	Engineering
WOS类目	Engineering, Environmental ; Engineering, Chemical
WOS记录号	WOS:001172004200001
来源期刊	CHEMICAL ENGINEERING JOURNAL
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/301715
作者单位	Anhui University; Qinghai University; Chinese Academy of Sciences; Hefei Institutes of Physical Science, CAS; Chinese Academy of Sciences; University of Science & Technology of China, CAS; University of Hong Kong
推荐引用方式 GB/T 7714	Zhou, Jianguo,Xiang, Shuhong,Wang, Xinyu,et al. Highly selective lithium extraction from salt lake via carbon-coated lithium vanadium phosphate capacitive electrode[J],2024,482.
APA	Zhou, Jianguo,Xiang, Shuhong,Wang, Xinyu,Shin, Dong-Myeong,&Zhou, Hongjian.(2024).Highly selective lithium extraction from salt lake via carbon-coated lithium vanadium phosphate capacitive electrode.CHEMICAL ENGINEERING JOURNAL,482.
MLA	Zhou, Jianguo,et al."Highly selective lithium extraction from salt lake via carbon-coated lithium vanadium phosphate capacitive electrode".CHEMICAL ENGINEERING JOURNAL 482(2024).