Preparation Of Magnesium-based Magnesium Ion Battery Cathode Materials And Study On Its Electrochemical Performance

Magnesium hydroxide,basic magnesium carbonate,manganese acetate,manganese dioxide,stearic acid and other chemicals were selected to prepare magnesium ions doped with different transition metal manganese through solid phase reaction thermal crystallization,high temperature calcination,and hydrothermal method.The battery electrode materials at different temperatures were studied,including X-ray diffraction（XRD）,X-ray energy spectrum（EDS）,scanning electron microscope（SEM）,and thermogravimetric analysis（TGA）.By preparing and using an Mg（Al Cl₂EtBu）₂/THF solution as an electrolyte of a manganese-based magnesium ion positive electrode material.For this purpose,the steps and means of designing and researching the surface modification of the positive electrode material and the optimization of the process are performed so as to obtain a relatively high charging and discharging platform and a comparatively good electrochemical performance chart.0.25mol·L^-1Mg（Al Cl₂EtBu）₂/THFelectrolytewaspreparedusing di-n-butylmagnesium in organic solution,ethylaluminum dichloride in organic solution and tetrahydrofuran as reaction solutions.After the preparation,the discharge performance of the Mg（AlCl₂EtBu）₂/THF solution,the dissolution and deposition efficiency of the doped manganese,and the conductivity of the electrolyte were characterized by the discharge,electrolysis,and conductivity tests.The most suitable battery cathode material is needed.The magnesium-ion-doped magnesium ion electrode material Mg_xMn_yO₄prepared at different temperatures was selected as the battery anode,the magnesium strip was the battery anode,and the Mg（AlCl₂EtBu）₂/THF was assembled as the button battery for the battery electrolyte.The experimental results show that the prepared Mg_1.2Mn_1.6O₄ has a good crystal structure and particle size;its assembled button cell is more ideal electrochemical performance,and has a higher magnesium storage capacity,better removal and embedding Magnesium ion cycle performance.