Li3Sc2(PO4)3 is a promising candidate for use as an electrolyte in solid state lithium rechargeable microbatteries due to its stability in air, ease of preparation, and resistance to dielectric breakdown. The room temperature ionic conductivity was optimized resulting in an increase of over two orders of magnitude to 3×10-6S/cm. The formation of Li3(Sc2-xMx)(PO4)3, where M=Al3+ or Y3+, resulted in the decrease of porosity, greater sinterability, and considerable enhancement of the ionic conductivity. Yttrium substitutions enhanced the conductivity slightly while aluminum increased the room temperature ionic conductivity to 1.5×10-5S/cm for x=0.4. Preliminary electron beam evaporation of Li3Sc2(PO4)3 yielded amorphous thin films with ion ic conductivity as high as 5×10-5S/cm and a composition of Li4.8Sc1.4(PO4)3.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics