c-LLZO Solid Electrolyte Films With Metal Oxide Lithium Interface

The patent changes the production parameters by using flame-assisted spray pyrolysis instead of conventional solid-state reaction methods. This involves dissolving inorganic precursors (lithium nitrate, lanthanum nitrate, zirconium nitrate) in organic solvents to create a precursor solution, which is then sprayed and pyrolyzed in a flame to form uniform c-LLZO particles with narrow size distribution (20 nm to 10 μm), eliminating the need for high-energy ball milling and reducing overall energy consumption while being environmentally friendly.

The patent replaces mechanical mixing and high-energy ball milling processes with a chemical solution-based spray pyrolysis method. The precursor solution is atomized into droplets and converted to particles through flame pyrolysis, substituting mechanical energy-intensive processes with a chemical transformation approach that is both energy-efficient and environmentally benign.

The patent segments the particle formation process into controlled stages: (1) dissolution of precursors in organic solvents to form a homogeneous solution, (2) atomization of the solution into fine droplets, and (3) pyrolytic conversion to uniform particles. This segmentation allows precise control over particle size distribution (20 nm to 10 μm) and eliminates the need for post-synthesis size control methods.

The patent performs preliminary action by preparing a homogeneous precursor solution before particle formation. The inorganic precursors (lithium nitrate, lanthanum nitrate, zirconium nitrate) are thoroughly dissolved in organic solvents like ethanol or methanol, ensuring uniform distribution of all elements before pyrolysis. This preliminary homogenization guarantees uniform particle composition and size distribution in the final product.