SK Innovation has patented a lithium secondary battery negative electrode featuring a silicon-based active material that includes iron and aluminum. The electrode’s elemental composition must meet specific criteria regarding lithium, iron, and aluminum content, as defined by three relations in the patent. GlobalData’s report on SK Innovation 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 SK Innovation, Battery management systems was a key innovation area identified from patents. SK Innovation's grant share as of July 2024 was 33%. Grant share is based on the ratio of number of grants to total number of patents.
The granted patent US12074312B2 presents a novel negative electrode for lithium secondary batteries, characterized by a silicon-based active material that incorporates iron and aluminum. The claims detail specific relationships between the contents of lithium (A), iron (B), and aluminum (C) within the electrode material, as determined through Inductively Coupled Plasma (ICP) analysis. Notably, the patent stipulates that the ratio A/(B²+C²) must not exceed 4,500 ppm?¹, with lithium content ranging from 5,000 ppm to 150,000 ppm. Additional claims refine these parameters, suggesting that a more stringent ratio of A/(B²+C²) = 1,000 ppm?¹ may also be applicable, alongside a minimum combined content of iron and aluminum of 100 ppm.
Further enhancements to the negative electrode include the potential incorporation of artificial graphite and single-walled carbon nanotubes, which may improve performance characteristics. The silicon-based active material can also contain lithium and lithium silicate, represented by a specific chemical formula, indicating a structured approach to optimizing the electrode's composition. The patent encompasses a comprehensive framework for the development of lithium secondary batteries utilizing this innovative negative electrode, thereby contributing to advancements in battery technology.
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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.
