中文摘要：

通过固相反应,以四氧化三锰（Mn-3O-4）中间体为锰源制备出锰酸锂（LiMn-2O-4）和氟、铝共掺杂的锰酸锂（LiMn-（1.9）Al-（0.1）O-（3.9）F-（0.1））锂离子电池正极材料。以XRD、SEM、充放电测试和循环伏安（CV）测试对其结构、形貌以及电化学性能进行了研究。结果表明,适量的铝（Al）、氟（F）掺杂未改变LiMn-2O-4的尖晶石结构。在0.2C倍率下,样品LiMn-2O-4和LiMn-（1.9）Al-（0.1）O-（3.9）F-（0.1）的首次放电比容量分别为120.1mAh/g和123.0mAh/g,循环100次后,容量保持率分别为75.27%和87.40%,样品LiMn-（1.9）Al-（0.1）O-（3.9）F-（0.1）表现出更好的循环稳定性。在5C倍率下,LiMn-（1.9）Al-（0.1）O-（3.9）F-（0.1）的放电比容量为90.0mAh/g,而LiMn-2O-4的放电比容量仅为71.4mAh/g。结果表明,铝（Al）、氟（F）共同掺杂在抑制Jahn-Teller畸变的基础上,进一步提高了LiMn-2O-4的放电比容量,明显改善了材料的循环稳定性和倍率性能。

英文摘要：

The lithium-ion battery anode material spinel LiMn2O4 and LiMn（1.9）Al（0.1）O（3.9）F（0.1） samples were synthesized by sol-gel reaction route,the effects of aluminum and fluorine co-doping on the structure,morphology and electrochemical performance of material were studied by XRD,SEM and CV,respectively.The results indicated that appropriate amount doping of Al and F doesn＇t change the spinel structure of LiMn2O4.Moreover,the samples of LiMn2O4 and LiMn（1.9）Al（0.1）O（3.9）F（0.1） had an initial discharge capacity of 120.1mAh/g and 123.0mAh/g at 0.2C,and 75.27% and 87.40% of the original capacity were reserved after 100 cycles,respectively.LiMn（1.9）Al（0.1）O（3.9）F（0.1） had better cycling performance.LiMn（1.9）Al（0.1）O（3.9）F（0.1） had the discharge capacity of 90.0mAh/g at 5C,higher than the 71.4mAh/g of LiMn2O4.It concluded that Al and F co-doping can improve the initial discharge capacity of LiMn（1.9）Al（0.1）O（3.9）F（0.1）,and enhanced the electrochemical performance.