Research progress of lithium manganese oxide materials in electrochemical lithium extraction applications
The electrochemical lithium extraction technology is extensively utilized in extracting lithium resources from salt lake brine,geothermal brine,and seawater owing to its high separation efficiency,cost-effectiveness,and environmentally friendly nature.This technology operates on the selective adsorption of lithium ions by electrode materials,making the physi-cochemical properties of these materials crucial to the system's performance.Lithium manganese oxide stands out among electrode materials due to its exceptional electrochemical activity,adsorption capacity,safety profile,and non-toxicity.How-ever,issues such as manganese dissolution and poor electronic conductivity during extended charge-discharge cycles hinder the commercial viability of lithium manganese oxide.The principles of capacitive deionization technology and the lithium ex-traction mechanism of LMO were elaborated.And the main modification methods of LMO were summarized and outlined,in-cluding element doping,surface coating,structural regulation,and composite formation with conductive substrates.Finally,the existing modification strategies of LMO were summarized from the reaction mechanism,and the upgrading and optimization of the electrochemical lithium extraction system were prospected and suggested from the perspective of practical application.