Toward Anode-Free Lithium-Ion Battery Using Amorphous Titanium Oxide Thin Films by Atmospheric-Pressure Mist Chemical Vapor Deposition

We demonstrate the potential of Lithium titanate (LiTiO) and amorphous titanium oxide (a-TiOx) thin films synthesized from titanium diisopropoxide bis acetylacetonate C16H28O6Ti [Ti(acac)2(OiPr)2] using atmospheric-pressure mist chemical vapor deposition method as negative electrode and solid electrolyte for anode-free lithium-ion battery (LIB). LTO thin films synthesized from Ti(acac)2(OiPr)2 and LiNO3 at 500 ℃ act as a negative electrode in LIB. In a-TiOx synthesized at 200-300 ℃, Li-ion permeability improved with charge/discharge cycles and acts as a solid electrolyte. The high diffusivity of Li ions demonstrated its superior behavior as a solid electrolyte. The a-TiOx solid electrolyte battery achieved an charge/discharge efficiency of 94%. These results imply that a-TiOx holds promise for realizing anode-free lithium metal batteries.