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 xLiFeO₂, yLi₃V₂(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 Li_1.67V_0.67 Fe_0.33 Co_0.33 [(PO₄)₃,O₂] composites have high efficiency and best performance in viewpoint of initial capacity, cyclability, charge and discharge capacities among these ten composites.