LiMn1.8 Mg0.2O4 spinel cathode material for Li ion rechargeable batteries

We have synthesized Mg doped lithium manganate spinel cathode material via sol-gel method (LiMn1.8 Mg0.2O4 ) for application in Li ion rechargeable batteries. The cathode material was annealed at different temperature from 500??900??C. C. It was found that the best crystallinity of the powder was obtained at 800??C. The lattice parameters for the material annealed at 500, 600, 700, 800, and 900??C was found 8.1320 ??, 8.1423 ??, 8.1631 ??, 8.1630 ??, 8.1757 ??, respectively. The cyclic voltammetric studies reveal intercalation-deintercalation of Li ion from the cathode material. The initial discharge capacity of LiMn1.8 Mg0.2O4 cathode material was found to be about 120 mAh/g. The rate cycleability studies show a very stable nature of LiMn1.8 Mg0.2O4 cathode at higher discharge currents (0.5 and 1 mA/cm2).