Multifunctional AlPO_(4)reconstructed LiMn_(2)O_(4)surface for electrochemical lithium extraction from brine  

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

机构地区：[1]School of Materials Science and Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China [2]School of Chemistry and Chemical Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China [3]College of Science,State Key Laboratory of Heavy Oil Processing,China University of Petroleum-Beijing,Beijing 102249,China [4]School of the Environment and Safety Engineering,Jiangsu University,Zhenjiang 212013,Jiangsu,China

出　　处：《Journal of Energy Chemistry》2024年第2期410-421,I0010,共13页能源化学（英文版）

基　　金：supported by the National Natural Science Foundation of China(21908082,22278426,and 22178154);the Jiangsu Funding Program for Excellent Postdoctoral Talent(2022ZB629);the Natural Science Foundation of Jiangsu Province(BK20221367);the China Postdoctoral Science Foundation(2021M701472)。

摘　　要：LiMn_(2)O_(4)(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 industrialized application.Hence,a multifunctional coating was developed by depositing amorphous AlPO_(4)on the surface of LMO using sol-gel method.The characterization and electrochemical performance test provided insights into the mechanism of Li^(+)embedment and de-embedment and revealed that multifunctional AlPO_(4)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.

关 键 词：LiMn_(2)O_(4) Multifunctional AlPO_(4)coating Li^(+)embedment and de-embedment mechanism Stability HYDROPHILICITY Various solution 

分 类 号：O646[理学—物理化学] TF826.3[理学—化学]