Li-ion conducting Li0.35La0.55TiO3 electrolyte thick films fabricated by aerosol deposition

Lithium lanthanum titanium oxide (Li0.35La0.55TiO3, LLT) films with thickness of 5 similar to 30 mu m were fabricated on a stainless-steel substrates by using aerosol deposition with a micron-sized powder at room temperature, and their Li-ion conductivity values were analyzed and compared with bulk ceramics sintered using the same powder. The crystalline size of the film was controlled by controlling the initial particle size of the LLT powder. The phase formation and the microstructural evolution of the films for different deposition conditions were observed by X-ray diffraction and electron microscopy. The lithium-ion conductivity of the film at room temperature was analyzed by the impedance measurement technique. The LLT bulk ceramic sintered at 1200 A degrees C and LLT film deposited at room-temperature showed total lithium ion conductivity of 8.37 x 10(-6) and 6.38 x 10(-7) S/cm, respectively.