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Preparation of half-coated manganese oxide lithium ion-sieve precursor with low manganese dissolution loss for lithium recovery
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DOI：10.1016/j.jwpe.2025.107785.png)
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Abstract
En 中文
Approximately 64 % of lithium resources exist in liquid form, and adsorption is considered as an effective method for lithium extraction. Among various lithium extraction materials, manganese oxide lithium ion-sieve has shown great promise as adsorbents for recovering lithium from solution. However, reducing manganese dissolution loss of manganese oxide lithium ion-sieve remains to be a huge challenge. In this work, a half-coated Li4Mn5O12@Li2MnO3 (HC-LMO) precursor was synthesized using solid-phase combustion method. The stability of the HC-LMO adsorbent was improved by adjusting the proportion of acid-resistant shell Li2MnO3. The experimental results demonstrate that the manganese dissolution loss in HC-HMO (Lithium ion-sieve obtained by Li+-H+ exchange of LMO, 0.8 %) was significantly lower compared to that in HMO (Lithium ion-sieve obtained by Li+-H+ exchange of LMO, 2.1 %) after 5 cycles. Additionally, the adsorption capacity of HC-HMO for Li+ ions decreased by 3.9 %, whereas that of HMO without an acid-resistant shell decreased by 12.5 %. The Li2MnO3 contributing to the enhanced stability of HC-LMO during acid treatment. The HC-LMO exhibits a simple synthesis method and excellent cycling stability.
Keywords:
Lithium recovery
Half-coated manganese oxide lithium ion-sieve
Solid-phase combustion method
Manganese dissolution loss
Journal
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6.7
Papers:
1.0W
Citations:
3.3W
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