半包覆锰基复合锂离子筛的制备与吸附性能

doi:10.11896/cldb.23110239

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Abstract The adsorption method is an important method for extracting liquid lithium resources, among which manganese-based ion-sieve adsorbent has great application potential. However, there are still some technical problems such as complex preparation methods and a high Mn dissolution loss rate. In this work, a composite precursor of Li₄Mn₅O₁₂·Li₂MnO₃ was prepared by solid-phase method. The synthesized precursor was analyzed and characterized by XRD, SEM, TEM, XPS, thermostats, specific surface area and pore size, and the adsorption performance and cycle stability of Li⁺ in liquid by the semi-coated Mn-based composite lithium ion-sieve were studied. The results showed that Li₄Mn₅O₁₂ and Li₂MnO₃ combine in polyphase symbiosis, and the semi-coated structure increases the stability of the lithium ion-sieve. The adsorption of Li⁺ by a semi-coated Mn-based composite lithium ion-sieve is chemical monolayer adsorption, and the increase in temperature is beneficial to the adsorption process. The adsorption capacity of the semi-coated Mn-based composite lithium ion-sieve is 26.51 mg/g, and the adsorption capacity loss is only 3.82% after five cycles, while that of the uncoated lithium ion-sieve is as high as 12.6%. Meanwhile, the Mn dissolution loss rate is only 0.83% after five cycles, which is significantly lower than that of the uncoated lithium ion-sieve (2.06%). The semi-coated Mn-based composite lithium ion-sieve prepared in this work is expected to be used for the extraction of liquid lithium resources.

Key words： Mn-based composite lithium ion-sieve semi-coated structure Mn dissolution loss adsorption performance

Published: 25 February 2025 Online: 2025-02-18

CLC number:

O647.3

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	Articles by authors
	LIU Ping
	WANG Chen
	HAN Qingwen
	MIAO Pan
	MA Jiayu

Cite this article:

LIU Ping,WANG Chen,HAN Qingwen, et al. Preparation and Adsorption Performance of Semi-coated Manganese-based Composite Lithium Ion-Sieve[J]. Materials Reports, 2025, 39(4): 23110239-7.

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https://www.mater-rep.com/EN/10.11896/cldb.23110239 OR https://www.mater-rep.com/EN/Y2025/V39/I4/23110239

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