Solid-State Electrolytes for Li-Batteries and Methods for the Production Thereof

Simple SummaryContent extracted from patent full text and abstract with AI.

This patent describes a process for producing highly pure and easily sinterable lithium titanium phosphate (LTP) and its substituted forms via a specific sol-gel method. The resulting materials demonstrate high lithium-ion conductivity and are particularly suited for use as solid electrolytes in lithium batteries, including solid-state lithium-ion batteries and lithium/air batteries. The invention enables the production of dense, phase-pure materials at lower cost and with simpler processing compared to previous methods.

Use CasesContent extracted from patent full text and abstract with AI.

• Solid-state electrolytes in lithium-ion rechargeable batteries
• Electrolytes in Li/air (lithium-air) batteries
• High-performance energy storage devices for electric vehicles (EVs) and hybrid vehicles
• Grid-scale renewable-energy storage systems
• Portable electronics requiring safe, compact, high-energy batteries
• Wearable devices with miniaturized solid-state batteries
• Medical devices and sensors relying on high-safety power sources

BenefitsContent extracted from patent full text and abstract with AI.

• Improved safety as the solid electrolytes are less flammable than liquid counterparts, reducing fire risk in batteries
• High lithium-ion conductivity at room temperature enables better battery performance and fast charging capability
• Production method allows for cost-effective, scalable manufacturing with simple equipment
• Produces highly dense, phase-pure materials that enhance the reliability and lifespan of batteries
• Easier and more energy-efficient sintering (densification) process due to excellent material properties
• Versatility in material composition (various metal substitutions possible) allows tuning of ionic conductivity and mechanical properties
• Potential to enable next-generation high-energy-density batteries suitable for demanding applications

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The present invention relates to a process by which single-phase and readily sinterable material based on lithium titanium phosphates can be provided. The process is a sol-gel process in which a stable aqueous TiO2+ nitrate solution is provided in one component step. The unsubstituted or substituted lithium titanium phosphate to be prepared has the following composition: Li1+x+yMxTi2-x(PO4)3-y(SiO4)y with M = Al, Ga, In, Sc, V, Cr, Mn, Co, Fe, Y, La-Lu with 0 99% of the theoretical density), has a very good lithium ion conductivity in the range from 1 x 10-4 to 1 x 10-3 S/cm at room temperature and in that respect is usable advantageously as a solid-state electrolyte in a lithium battery or an Li/air battery or a lithium ion accumulator.