Furukawa. has filed a patent for a sulfide-based inorganic solid electrolyte material containing Li, P, and S elements. The material’s 31P-NMR spectrum shows a significant presence of P2S6 glass structure peaks alongside PS4 structure peaks. GlobalData’s report on Furukawa 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 Furukawa, Lithium-ion batteries was a key innovation area identified from patents. Furukawa's grant share as of January 2024 was 33%. Grant share is based on the ratio of number of grants to total number of patents.
Solid electrolyte material with specific p2s6 glass structure
The patent application (Publication Number: US20240030488A1) discloses a sulfide-based inorganic solid electrolyte material for use in lithium-ion batteries. The material comprises Li, P, and S as constituent elements and exhibits specific characteristics in a 31P-NMR spectrum. The material must have a certain ratio of peaks derived from PS4 and P2S6 structures to meet the defined criteria.
Furthermore, the solid electrolyte material must possess a lithium ionic conductivity of 1.5×10-3 S/cm or higher and be composed of particles with a median size of 0.1 to 10 µm. The molar ratios of Li/P and S/P in the material are also specified. The patent application extends to the use of this solid electrolyte material in a solid electrolyte, a solid electrolyte membrane, and ultimately in a lithium-ion battery, where it can be incorporated into the positive electrode active material layer, the electrolyte layer, or the negative electrode active material layer to enhance battery performance and stability.
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