Compared with traditional cathode materials such as lithium cobalt oxide,lithium manganate has the advantages of abundant resources,low cost,no pollution,good safety,good rate performance,etc.,and is an ideal cathode material for power batteries.The LiMn2 O4 cathode material was prepared by high temperature solid sintering method by changing the sintering temperature,and the LiMn2 O4 cath-ode material was prepared with different coating thickness to improve the electrochemical performance of lithium manganate battery.In this paper,scanning electron microscope(SEM)and transmission electron microscope(TEM)were used to analyze the morphology of the electrode materials.The electrode react-ants and components of the prepared electrode were analyzed by TGA/DSC.The electrochemical per-formance of the electrodes was analyzed by using the battery test system and electrochemical workstation.The results show that when the LiMn2 O4 cathode material is nano-structured and some of the particles were agglomerated;TGA/DSC data showed that the cathode was not decomposed at 800℃.Compared with the electrochemical test data,when the sintering temperature reaches 800℃,the sample material has good crystallinity and the morphology of apical octahedron,and its comprehensive electrochemical performance is much better than that of other groups of sample materials at the sintering temperature(600℃,700℃and 900℃).At 0.2 C,the highest initial specific capacity was 135.8 mAh·g-1,the Cou-lomb efficiency was 94.15%,and the electrode coated with 200 μm thickness showed better electro-chemical performance than that of 100 μm.
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