首页|Multifunctional AlPO4 reconstructed LiMn2O4 surface for electrochemical lithium extraction from brine

Multifunctional AlPO4 reconstructed LiMn2O4 surface for electrochemical lithium extraction from brine

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LiMn2O4(LMO)electrochemical lithium-ion pump has gained widespread attention due to its green,high efficiency,and low energy consumption in selectively extracting lithium from brine.However,collapse of crystal structure and loss of lithium extraction capacity caused by Mn dissolution loss limits its industri-alized application.Hence,a multifunctional coating was developed by depositing amorphous AlPO4 on the surface of LMO using sol-gel method.The characterization and electrochemical performance test pro-vided insights into the mechanism of Li+embedment and de-embedment and revealed that multifunc-tional AlPO4 can reconstruct the physical and chemical state of LMO surface to improve the interface hydrophilicity,promote the transport of Li+,strengthen cycle stability.Remarkably,after 20 cycles,the capacity retention rate of 0.5AP-LMO reached 93.6％with only 0.147％Mn dissolution loss.The average Li+release capacity of 0.5AP-LMO//Ag system in simulated brine is 28.77 mg/(g h),which is 90.4％higher than LMO.Encouragingly,even in the more complex Zabuye real brine,0.5AP-LMO//Ag can still maintain excellent lithium extraction performance.These results indicate that the 0.5AP-LMO//Ag lithium-ion pump shows promising potential as a Li+selective extraction system.

LiMn2O4Multifunctional AlPO4 coatingLi+ embedment and de-embedmentmechanismStabilityHydrophilicityVarious solution

Jun Gu、Linlin Chen、Xiaowei Li、Guiling Luo、Linjing Fan、Yanhong Chao、Haiyan Ji、Wenshuai Zhu

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School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China

School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China

School of the Environment and Safety Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China

College of Science,State Key Laboratory of Heavy Oil Processing,China University of Petroleum-Beijing,Beijing 102249,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaJiangsu Funding Program for Excellent Postdoctoral TalentNatural Science Foundation of Jiangsu ProvinceChina Postdoctoral Science Foundation

2190808222278426221781542022ZB629BK202213672021M701472

2024

10.1016/j.jechem.2023.10.005

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.89(2)
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