Solid-State Electrolytes and Their Preparation

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

This invention introduces a fast and solvent-free method for producing a polymer-based solid-state electrolyte (SPE) for batteries. The process uses a cationic ring-opening polymerization of a precursor solution containing at least one lithium salt and one liquid heterocyclic monomer or oligomer. The resulting SPE features a low glass transition temperature (below -50 °C), high ionic conductivity, and a broad electrochemical stability window, making it suitable for advanced battery applications.

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

• Development of solid-state lithium-metal batteries for electric vehicles
• Rechargeable lithium metal batteries for consumer electronics
• High-performance energy storage systems for renewable energy integration
• Safer and longer-lasting battery packs for power tools or industrial devices
• Battery solutions in cold environments due to low glass transition temperature

BenefitsContent extracted from patent full text and abstract with AI.

• Enables faster and more efficient manufacturing of solid-state electrolytes
• Improved electrolyte stability and safety compared to liquid electrolytes
• High ionic conductivity enhances battery performance
• Low glass transition temperature allows operation at low temperatures
• Broad electrochemical stability window supports use with lithium-metal anodes, enabling higher energy densities

Technical Classifications (CPCs)

Inventors & Applicants

Patent Abstract

The invention discloses a particularly rapid process for the production of a polymeric solid-state electrolyte (SPE) by means of a cationic ring-opening and polymerization reaction of a precursor solution comprising at least one lithium salt and at least one liquid heterocyclic monomer or oligomer, wherein the ring-opening and polymerization reaction is carried out in the absence of a solvent. The polymeric solid-state electrolyte thus produced regularly exhibits a low glass transition temperature of less than -50 °C. Solid electrolytes investigated to date exhibited an ionic conductivity between 5·10⁻⁵ S cm⁻¹ and 1.2·10⁻⁴ S cm⁻¹ at 30 °C, as well as a broad electrochemical stability window of more than 5 V against Li/Li⁺. Thus, the polymeric solid-state electrolytes (SPE) presented here and produced according to the invention by means of the CROP process are an important candidate for the development of a fully functional lithium-metal battery.