Halide Solid Electrolyte Composition for Submicron Thin-Film Conductivity

An organic solvent is introduced as an intermediary substance during the particle size reduction process. The solvent mediates between the mechanical grinding action and the solid electrolyte particles, enabling effective size reduction while protecting the particles from excessive damage that would harm ion conductivity. The solvent allows controlled dispersion and prevents particle aggregation, maintaining conductivity despite reduced size.

The invention changes the physical and chemical parameters of the processing environment by introducing organic solvents with specific properties (ether groups, halogen groups, hydrocarbon chains). These parameter changes in the processing medium enable effective particle size reduction to ≤1 μm while preserving the crystal structure and ion conductivity of the solid electrolyte material through controlled interaction mechanisms.

The organic solvent acts as a mediator that enables the particle size reduction necessary for high energy density applications. By controlling the interaction between grinding media and particles in the presence of the solvent, the material achieves fine particle sizes for thin film formation while the solvent protects the crystal structure from damage, thereby maintaining ion conductivity required for battery performance.

The invention creates a composite processing system consisting of the halide solid electrolyte material combined with specifically selected organic solvents during the size reduction process. This composite approach leverages the synergistic effects between the solvent molecules and electrolyte particles, where the solvent's molecular structure (ether, halogen, or hydrocarbon groups) interacts with the particle surfaces to maintain structural integrity and conductivity while achieving the fine particle size distribution needed for high energy density batteries.