Idemitsu Kosan has patented a method for producing a sulfide solid electrolyte with an argyrodite crystal structure. The process involves mixing a raw material with elemental phosphorus at a specific power level and heat-treating the mixture within a defined temperature range. GlobalData’s report on Idemitsu Kosan gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Idemitsu Kosan, Anti-wear lubricants was a key innovation area identified from patents. Idemitsu Kosan's grant share as of February 2024 was 40%. Grant share is based on the ratio of number of grants to total number of patents.
Method for producing sulfide solid electrolyte with argyrodite crystal structure
A recently granted patent (Publication Number: US11916191B2) discloses a method for producing a sulfide solid electrolyte with an argyrodite crystal structure. The method involves mixing a raw material containing elemental phosphorus at a specific integrated power level and heat-treating the resulting precursor within a temperature range of 350 to 500°C. The integrated power during mixing is crucial, falling within the range of 0.5 to 20 kWh/kg, with further optional raw materials including elemental sulfur, lithium, chlorine, and/or bromine. The precursor obtained may contain P2S64- glass, with specific peak intensity requirements in solid 31P-NMR measurements to ensure quality.
Additionally, the patent outlines specific parameters for the heat-treating process, emphasizing atmospheric pressure and an inert atmosphere. The temperature during heat treatment should be at least 360°C, preferably falling within the range of 380 to 450°C, and conducted for a duration of 0.5 to 12 hours. The weight loss ratio of the precursor at 600°C should not exceed 1.5%, with integrated power during mixing limited to 1 to 10 kWh/kg. Furthermore, the mixing time is specified to be between 10 minutes to 10 hours, ensuring the production of a sulfide solid electrolyte with the desired crystal structure and properties.
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GlobalData’s Patent Analytics tracks patent filings and grants from official offices around the world. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
