Synthesis and Structural Characterization of a Novel Ternary Composite Containing xLiFeO2,yLi3V2(PO4)3, AND (1-x-y)LiCoO2 Composites for 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 Li3V2(PO4)(3) (LVP), was applied instead of pure LiCoO2 to reduce usage of a percentage Co amount, consequently reducing the cost of cobalt and removing its toxic effect in LIBs. In this study, we synthesized ten samples from mixture of xLiFeO(2), yLi(3)V(2)(PO4)(3), and (1 - x - y)LiCoO2 compounds for preparing a suitable cathode electrode 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 Li1.67V0.67 Fe-0.33 Co-0.33 [(PO4)(3),O-2] composites have high efficiency and best performance in viewpoint of initial capacity, cyclability, charge and discharge capacities among these ten composites.