AGC had 13 patents in batteries during Q3 2023. AGC Inc filed 10 patents in Batteries theme during Q3 2023. AGC Inc has filed a patent for a sulfide solid electrolyte for use in lithium-ion secondary batteries. The electrolyte has an argyrodite crystal structure with specific characteristics, including peak A and peak B in the X-ray diffraction spectrum, a full width at half maximum of 0.07° or more, and a difference of 0.05° or more between the diffraction angles of peak A and peak B. GlobalData’s report on AGC gives a 360-degreee view of the company including its patenting strategy. Buy the report here.
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AGC grant share with batteries as a theme is 38% in Q3 2023. Grant share is based on the ratio of number of grants to total number of patents.
Recent Patents
Application: Sulfide solid electrolyte and method for manufacturing same (Patent ID: US20230246227A1)
The patent filed by AGC Inc. describes a sulfide solid electrolyte for use in a lithium-ion secondary battery. The electrolyte has an argyrodite crystal structure represented by LiaPSbHac, where the values of a, b, and c fall within specific ranges. The electrolyte exhibits two peaks, A and B, in its X-ray diffraction spectrum, with each peak having a full width at half maximum of 0.07° or more within a range of 2?=30.3°±0.5°. The difference between the diffraction angles of peak A and peak B is 0.05° or more.
Claim 1 states that the sulfide solid electrolyte comprises the argyrodite crystal structure described above. Claim 2 specifies that peaks A and B are derived from two argyrodite crystal structures with different lattice constants that differ by 0.02 Å or more.
Claim 3 introduces a heat treatment process. After the heat treatment is performed at a temperature of 400°C or higher but below the thermal decomposition temperature for 1 hour, certain phenomena are observed in the X-ray diffraction spectrum. These include a decrease in the peak intensity ratio of peak A, an increase in the peak intensity ratio of peak B, and the appearance of peak C, which is located between peaks A and B or an increase in the peak intensity ratio of peak C.
Claim 4 specifies that peak C is present between peaks A and B. Claim 5 reiterates the sulfide solid electrolyte with the argyrodite crystal structure described in claim 1.
Claim 6 introduces a method for manufacturing the sulfide solid electrolyte. The method involves mixing raw materials comprising Li, P, S, and Ha (a halogen element), heating and melting the raw materials, and then performing crystallization through rapid cooling under normal pressure. The resulting sulfide solid electrolyte comprises two or more different argyrodite crystal structures.
Claim 7 adds an additional step to the manufacturing method, which involves performing a heat treatment at a temperature range of 200°C to 600°C for a duration of 0.1 hours to 10 hours after the crystallization process.
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