磷掺杂的锰酸锂正极材料的合成及电化学性能

Synthesis and electrochemical property of lithium manganese oxide spinel by phosphorus-doping

用固相法合成了锂离子电池正极材料LiMn2O4与LiMn2O4-x(PO4)x,结果表明:材料LiMnO4-x(PO4)x的电化学循环性能优于LiMn2O4。合成的LiMn2O3.97(PO4)0.03材料在电化学循环过程,首次放电容量为124.8mAh/g,100次循环后,放电容量为110.6mAh/g,容量保持率为88.6%,有望成为动力锂离子电池行业优良的正极材料。

Spinel structural LiMn2 04 and LiMn2 04-x （PO4）x, as the anode of lithium ionic cell were synthesized by the solid-state reaction method. The results of charge-discharge testing showed that the cycling performance of LiMn2O4-x （PO4）, was better than that of LiMn2 04. The results of charge-discharge testing showed that the initial discharge capacity of LiMn2 O3.97 （PO4）0.03 was 124.8mAh/g, and had a capacity of 110. 6mAh/g after 100 charge-discharge cycles at room temperature with a high capacity retention of 88.6 %. This material had a high capacity and rather good cycling perform- ance,so it could be hoped to be used as an excellent anode material of lithium ionic cell.