Preparation and characterization of lithium λ-MnO2 ion-sieves

Chang WANG, Yanlong ZHAI, Xi WANG, Ming ZENG

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PDF(597 KB)
Front. Chem. Sci. Eng. ›› 2014, Vol. 8 ›› Issue (4) : 471-477. DOI: 10.1007/s11705-014-1449-3
RESEARCH ARTICLE

Preparation and characterization of lithium λ-MnO2 ion-sieves

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Abstract

Lithium λ-MnO2 ion-sieves were prepared from spinel LiMn2O4 via treatment with nitric acid. The LiMn2O4 was synthesized by a solid state reaction between LiOH·H2O and MnO2. The effects of the calcination time and temperature on the preparation of the LiMn2O4 precursor and the lithium ion-sieve were investigated. In addition, the Li+ extraction ratio, the Mn2+ dissolving ratio and the adsorption properties of the lithium ion-sieve were all measured. The lithium ion-sieve had a high exchange capacity and was selective for Li+. Specifically, at pH= 13, the ion exchange capacity of Li+ was 30.9 mg/g in 10 mmol/L LiCl solution and the lithium extraction ratio and manganese dissolving ratio were 95% and 25%, respectively.

Keywords

lithium ion-sieve / solid state reaction / adsorption / LiMn2O4

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Chang WANG, Yanlong ZHAI, Xi WANG, Ming ZENG. Preparation and characterization of lithium λ-MnO2 ion-sieves. Front. Chem. Sci. Eng., 2014, 8(4): 471‒477 https://doi.org/10.1007/s11705-014-1449-3

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