Effect of $Li_4Ti_5O_{12}$ coating layer on capacity retention of $LiMn_2O_4$ as cathode materials of lithium ion secondary batteries for HEV application

HEV용 리튬 이차전지 양극물질 $LiMn_2O_4$에 $Li_4Ti_5O_{12}$ 코팅에 따른 영향

In these recent years, low cost and stable battery electrode materials have been studied for HV/HEV application. Spinel cathode material $LiMn_2O_4$ is widely studied as a promising cathode material of lithium ion secondary batteries because of it is low cost, easily to be prepared and capable to be operated in high voltage range. In this study, $LiMn_2O_4$ was undergoing surface modification with spinel lithium titanium oxide by sol-gel method in order to enhance its capacity retention. Properties of both unmodified and surface-modified $LiMn_2O_4$ were characterized by XRD, SEM, particle size analyzer while their cycling performance was tested with charge and discharge tester.