LiMgxNi0.5-xMn1.5O4的制备和电化学性能

Preparation and Electrochemical Properties of LiMgxNi0.5-xMn1.5O4

摘要:

为改善LiNi0.5Mn1.5O4的电化学性能，采用流变相法合成掺镁的锂离子电池正极材料LiMgxNi0.5-xMn1.5O4(x=0，0.05，0.1)。XRD测试结果表明所得材料仍为尖晶石结构。电化学性能测试结果显示：当x取值0.1，在3.5~4.9 V电压范围内进行充放电循环时，材料LiMg0.1Ni0.4Mn1.5O4具有较好的循环性能，1 C充放电时，初始放电比容量可达110.22 mAh/g，30次循环后容量衰减率仅为7.7%。

Abstract:

In order to improve the electrochemical properties of LiNi0.5Mn1.5O4, a series of Li-ion batteries cathode materials LiMgxNi0.5-xMn1.5O4 (x=0, 0.05, 0.1) were prepared by rheological method. XRD results reveal that the synthesized compounds had the spinel structure. Electrochemical tests show that when x was 0.1 the sample LiMg0.1Ni0.4Mn1.5O4 had excellent cycle ability in the potential range from 3.5 to 4.9 V. When the charge and discharge current was 1 C, the LiMg0.1Ni0.4Mn1.5O4 electrode delivered the initial discharge capacity of 110.22 mAh/g. Its capacity decline rate after 30 cycles was only 7.7%.