PHYSICAL CHARACTERIZATION OF NEW LI-ION CONDUCTING NASICON MATERIALS IN THE LI1+2XTA1-XALX+1(PO4)3

Abstract

Fabrication of all-solid-state Li battery with non-flammable ceramics electrolyte has been strongly required to overcome safety issues of present Li batteries. One of the promising structures of ceramic electrolyte in solid state battery is the NASICON structure composed of 3 dimensional frameworks (s.g. R-3c). In this study, Li-ion conducting mixed metal phosphate Li1+2xTa1-xAlx+1(PO4)3, L Ta A P-x(x = 0 ~ 0.5) solid electrolyte that possess rhombohedra NASICON structure was prepared via conventional solid state reaction techniques at various sintering temperature ranging from 700 – 1000 °C for 12 h at 5 °C per minute heating and cooling rate. Physical properties of the prepared materials show densification of solid electrolyte at 800 °C sintering temperature and could serve as a solid electrolyte in the application of solid state lithium ion batteries industry.