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Invention Title:

NEW Li-CONDUCTOR PROTOTYPES IN THE Li-Hf-O CHEMICAL SPACE FOR ALL-SOLID-STATE BATTERIES

Publication number:

US20250357533

Publication date:
Section:

Electricity

Class:

H01M10/0562

Inventors:

Assignee:

Applicant:

Smart overview of the Invention

The patent application introduces novel lithium hafnium oxides as potential solid electrolytes for all-solid-state batteries (SSBs). These materials are designed to improve the safety and energy density of lithium batteries by replacing conventional flammable liquid electrolytes with solid alternatives. The compositions are based on the Li-Hf-O chemical space and are achieved through a machine learning-based crystal structure prediction algorithm.

Composition Details

The lithium hafnium oxides presented in this application have parent compositions such as Li6-zHf2-xMxO7, Li8-zHf1-xMxO6, and others. These compositions include one-way, two-way, or three-way combinations of various metal ions like Sc3+, Y3+, and Ce4+, ensuring charge neutrality. The parameters z and x define the stoichiometric variations within the compounds, allowing customization for enhanced performance.

Advantages and Innovations

These new materials aim to address current challenges in SSBs, such as achieving high ionic conductivity at room temperature and ensuring stable interfaces between electrolytes and electrodes. The novel compositions offer potential improvements in configurational entropy, which can lead to increased Li-ion conductivity. By incorporating cheaper elements, the cost-effectiveness of these solid electrolytes is also enhanced.

Potential Applications

The lithium hafnium oxides developed in this patent can be utilized as solid electrolyte materials for lithium batteries, providing a safer alternative to liquid electrolytes. They offer high conductivity and stability in aqueous environments, making them suitable for advanced battery technologies that require reliable performance and safety.

Embodiments and Variations

The application outlines several embodiments of the lithium hafnium oxides, each with specific crystallization properties and metal ion combinations. These variations allow for tailored performance characteristics depending on the specific needs of different battery applications. The flexibility in composition makes these materials versatile candidates for next-generation SSBs.