SK Innovation has been granted a patent for a cathode in lithium secondary batteries. The cathode includes multiple layers of different active materials, with the closest layer to the current collector having a diameter of 0.5 µm or less. The design aims to improve battery performance. 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 January 2024 was 31%. Grant share is based on the ratio of number of grants to total number of patents.

Cathode for lithium secondary battery with specific active material layer

Source: United States Patent and Trademark Office (USPTO). Credit: SK Innovation Co Ltd

A recently granted patent (Publication Number: US11888155B1) discloses a novel cathode design for lithium secondary batteries. The cathode comprises a cathode current collector and a cathode active material layer with multiple active material layers containing different types of cathode active material particles. The closest active material layer to the current collector has a specific diameter attribute (DA) of 0.5 µm or less, determined by analyzing the distribution of particles in a 3D model. Additionally, the patent outlines equations and ranges for the DA values of neighboring active material layers, emphasizing the importance of particle size and distribution for optimal battery performance.

Furthermore, the patent details the composition and characteristics of the cathode active material layers, including specific DA and length attributes, particle shapes, average particle diameters, content percentages, and density ranges. The cathode design aims to enhance battery efficiency and performance by carefully controlling the properties of the active material layers. The patent also extends to the application of the cathode in a lithium secondary battery setup, along with an anode component. Overall, the innovative cathode design described in the patent offers a structured approach to optimizing lithium secondary battery performance through precise control of active material properties and layer configurations.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

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.