US20260142226
2026-05-21
Electricity
H01M10/0562
The patent application introduces novel lithium-containing compounds within the Li-Mg-Na-Cl chemical space, specifically LiNaMg2Cl6 and LiNaMg3Cl8. These compounds are proposed for use in solid-state batteries (SSBs) as solid electrolytes, catholytes, or anolytes. The development aims to enhance battery safety and energy density by replacing traditional liquid electrolytes, which pose safety risks due to flammability and leakage.
With the rise of portable electronics and electric vehicles, there is a growing demand for safer and more efficient energy storage solutions. Traditional lithium-ion batteries use organic liquid electrolytes, which can be hazardous. Solid-state batteries offer a promising alternative, providing enhanced safety and higher energy density. The patent focuses on lithium-ion conductors that are crucial for the performance of SSBs, highlighting the limitations of current sulfide and oxide materials and the potential of halide materials.
The application details the discovery of novel lithium-containing chlorides: LiNaMg2Cl6 and LiNaMg3Cl8. These compounds are designed to serve as solid electrolyte materials in lithium batteries. They can also function as catholytes or coatings for cathode materials and as anolytes with alloy anodes. The compounds promise high ionic conductivity and good deformability, addressing key challenges in SSB development.
Various embodiments of the invention are described, including lithium solid-state batteries incorporating the new compounds. These embodiments cover different configurations, such as using the compounds in the solid electrolyte layer, as catholytes or coatings, and as anolytes. The crystallization of these compounds in specific space groups (R-3 and P3m1) is also detailed, contributing to their structural stability and performance.
The application includes drawings to aid understanding. Figure 1 illustrates an all-solid-state battery. Figure 2 presents the crystal structures of the compounds NaLiMg2Cl6 and NaLiMg3Cl8. Figures 3A and 3B show the calculated powder diffraction patterns for these compounds, demonstrating their crystallization in the specified space groups.