Synthesis and Electrochemical Characterization of a Novel Ternary Composite, Containing xLiFeO2, yLiCoO2, and [1-(x plus y)]LiNi1/2Mn1/2O2, Composites for Cathode Material in Lithium Ion Batteries (LIBs)

Abstract

The objective of this research is to prepare a composite with lower cost and better cyclability than the other cathode materials in lithium ion battery. A ternary composition with high efficiency and low cost containing LiFeO2 and LiNi1/2Mn1/2O2, was applied instead of pure LiCoO2 to reduce usage of the percentage Co amount in cathode materials of LIBs, consequently a benefit would be yielded by reducing the cost of cobalt and also by removing its toxic effect in LIBs the environment will be safe. In this study, we synthesized ten samples from mixture of xLiFeO(2), yLiCoO(2), and (1 - x - y)LiNi1/2Mn1/2O2 compounds for preparing suitable cathode electrodes with high initial discharge capacity, large cyclability and inexpensive cost instead of traditional cathode materials. As a result by using Raman Analysis, X-ray diffraction, and electrochemical analyzing, we found that the LiNi1/6Mn1/6Fe1/3Co1/3O2 composite has high efficiency and best performance in viewpoint of initial capacity, cyclability, charge capacity, and discharge capacity among these ten composites.