Synthesis and Characterization of LiFePO4 By Variation Addition Of (Li3PO4)0.5(AgI)0.25(LiI)0.25 as Cathode Material For All-Solid-State Li-ion Battery

Abstract

The safety of lihium-ion batteries have always been a concerned for industrial application. Therefore, there is a strong interest to produce an all-solid-state battery. An all-solid-state battery has several advantages, including easy fabrication, non-flammable, low leakage, but mainly because it is safer. In this study, (Li3PO4)0.5(AgI)0.5(LiI)0.25 was synthesized as solid electrolyte. Meanwhile, as cathode, LiFePO4 was added by variations of: 0%, 10%, and 30% of (Li3PO4)0.5(AgI)0.5(LiI)0.25 to minimize the presence of solid state interface between solid electrolyte and cathode. The samples were characterized using Scanning Electron Microscope (SEM), X-Ray Diffraction (XRD), and conductivity measurement. For SEM images, the particle distribution was not thoroughly homogeneous because it was prepared manually by only grinding the samples. The X-ray data showed that (Li3PO4)0.5(AgI)0.5(LiI)0.25 has halo pattern and the crystal structure of synthesized cathode belongs to P m n a space group (Olivine Structure). The range of measured AC conductivity was around 10−4 S/cm - 10−8 S/cm.