SK Innovation had three patents in advanced materials during Q4 2023. The patent filed by SK Innovation Co Ltd in Q4 2023 relates to a negative electrode for a lithium secondary battery containing a silicon-based active material with iron and aluminum. The method of manufacturing ensures specific content ratios of Li, Fe, and Al in the electrode material layer. GlobalData’s report on SK Innovation gives a 360-degreee view of the company including its patenting strategy. Buy the report here.
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SK Innovation grant share with advanced materials as a theme is 33% in Q4 2023. Grant share is based on the ratio of number of grants to total number of patents.
Recent Patents
Application: Negative electrode for lithium secondary battery and method of manufacturing the same (Patent ID: US20230420642A1)
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The patent filed by SK Innovation Co Ltd. describes a negative electrode for a lithium secondary battery that includes a silicon-based negative electrode active material with specific content requirements for lithium, iron, and aluminum. The method of manufacturing this negative electrode involves stirring a solution or dispersion containing silicon-based material, iron precursor, and aluminum precursor, followed by heat treatment to create a negative electrode active material co-doped with iron and aluminum. The process includes specific parameters such as Fe/Si and Al/Si molar ratios, stirring speed, temperature, and heat treatment temperature to ensure the desired composition and properties of the negative electrode.
Furthermore, the negative electrode may also include artificial graphite, single-walled carbon nanotubes, and lithium in the silicon-based negative electrode active material. The silicon-based material can be a lithium silicate represented by a specific chemical formula. The method of manufacturing involves precise control over the composition and processing parameters to achieve the desired negative electrode characteristics. The resulting negative electrode can be used in a lithium secondary battery, providing enhanced performance and stability.
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