The rapid commercialization of lithium–ion batteries has caused significant expansion of the lithium demand.Electrochemical lithium ions pump is a promising technology because of its good selectivity and friendly env...The rapid commercialization of lithium–ion batteries has caused significant expansion of the lithium demand.Electrochemical lithium ions pump is a promising technology because of its good selectivity and friendly environment.Herein,an Al_(2)O_(3)–ZrO_(2) film coating of the LiMn_(2)O_(4)(AlZr–LMO) electrode is prepared and operated for recovery of Li^(+)from brine.The Li^(+) maximum extraction capacity of AlZr–LMO reached 49.92 mg/g in one cycle.Compared with the solely LMO electrode,the AlZr–LMO demonstrated evident electrochemical stability and cycle life towards the Li^(+)recovery system.After 30 successive cycles,the extraction capacity for Li^(+)increased from 29.21%to 57.67%.The high cycle capacity of the material could be attributed to its low polarization,high active sites,and good chemical stability of the electrode surface owing to the synergy function of Al_(2)O_(3)–ZrO_(2)in the charging-discharging process.A dynamic model parameter identification method was performed to evaluate the active site of AlZr–LMO.This work may provide a way to design the AlZr–LMO electrode and develop a good method for the recovery of lithium from brine.展开更多
基金supported by the National Natural Science Foundation of China (21878133, 21908082, 22178154)the Natural Science Foundation of Jiangsu Province (BK20190854)+1 种基金the China Postdoctoral Science Foundation (2020M671364, 2021M701472)the Science & Technology Foundation of Zhenjiang (GY2020027)。
文摘The rapid commercialization of lithium–ion batteries has caused significant expansion of the lithium demand.Electrochemical lithium ions pump is a promising technology because of its good selectivity and friendly environment.Herein,an Al_(2)O_(3)–ZrO_(2) film coating of the LiMn_(2)O_(4)(AlZr–LMO) electrode is prepared and operated for recovery of Li^(+)from brine.The Li^(+) maximum extraction capacity of AlZr–LMO reached 49.92 mg/g in one cycle.Compared with the solely LMO electrode,the AlZr–LMO demonstrated evident electrochemical stability and cycle life towards the Li^(+)recovery system.After 30 successive cycles,the extraction capacity for Li^(+)increased from 29.21%to 57.67%.The high cycle capacity of the material could be attributed to its low polarization,high active sites,and good chemical stability of the electrode surface owing to the synergy function of Al_(2)O_(3)–ZrO_(2)in the charging-discharging process.A dynamic model parameter identification method was performed to evaluate the active site of AlZr–LMO.This work may provide a way to design the AlZr–LMO electrode and develop a good method for the recovery of lithium from brine.
