Solid Electrolyte Coating for Uniform All-Solid-State Battery Layers

The patent replaces the mechanical pressing system with a chemical solution-based system. Instead of using high pressing pressure to form the solid electrolyte layer, the invention uses a solid electrolyte solution that can be applied to the electrode surface, allowing the solid electrolyte to be formed through solvent evaporation and chemical processes rather than mechanical compression. This substitution eliminates the need for high-pressure equipment and enables scalable production.

The patent changes the physical state and composition parameters of the solid electrolyte. By transforming the solid electrolyte into a solution form (changing from solid to liquid state), the invention enables application through coating or infiltration methods rather than pressing. The solution contains dissolved solid electrolyte materials that can be uniformly distributed and then solidified through controlled evaporation or drying processes, achieving good interface bonding without high pressure.

The patent introduces an intermediary substance or process to achieve uniform surface formation. The solid electrolyte solution acts as an intermediary that can uniformly infiltrate the electrode porous structure, ensuring even distribution of solid electrolyte material. Additionally, the solution may contain additives or use controlled evaporation processes as intermediaries to prevent surface unevenness and pinhole formation during the solidification process.

The patent utilizes the porous structure of the electrode to improve surface uniformity. The solid electrolyte solution is designed to infiltrate the porous electrode structure uniformly, allowing the solution to penetrate deep into the electrode matrix through capillary action. This porous infiltration approach ensures even distribution of solid electrolyte throughout the electrode, preventing surface defects and pinholes that would occur with simple surface coating.