Solid state electrolytes (SE) are believed to be the ultimate solution for the current electrode dissolution (and other stability) problems encountered in Li-ion batteries. The safety enhancements that would be engendered by a viable technology based on non-flammable solid-phase electrolyte materials cannot be overstated and would have transformational impacts.  Some of the currently developed bulk type solid state Li ion conductors exhibit comparable Li ionic conductivity as liquid electrolyte. However, poor interface contact remains to be a critical issue when assemble solid electrolyte into a useful all solid state battery. Assembly of bulk solid electrolyte into a battery usually requires deformation of interfaces between electrolyte and two electrodes high pressures to achieve good interface contact. This process is hard to handle and less reproducible. In order to avoid the high pressure press and achieve better reproducibility a liquid electrolyte based buffer Li-ion transport layer was applied at interfaces to bridge these interfaces. Results show that the cell impedance reduced by up to two orders of magnitude with the interface buffer layer.