Sumitomo Metal Mining has filed a patent for a positive electrode active material for lithium-ion batteries. The material, a lithium-nickel composite oxide, offers high thermal stability at a low cost. It contains specific elements in precise ratios to enhance battery performance. GlobalData’s report on Sumitomo Metal Mining 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 Sumitomo Metal Mining, Extraction by leaching was a key innovation area identified from patents. Sumitomo Metal Mining's grant share as of January 2024 was 30%. Grant share is based on the ratio of number of grants to total number of patents.

Positive electrode active material for lithium ion secondary battery

Source: United States Patent and Trademark Office (USPTO). Credit: Sumitomo Metal Mining Co Ltd

The patent application (Publication Number: US20240021808A1) discloses a positive electrode active material for lithium-ion secondary batteries. The material consists of a lithium-nickel composite oxide with a hexagonal layered structure, composed of secondary particles with aggregated primary particles. The composition includes lithium, nickel, manganese, titanium, niobium, and optionally an additional element from a specified group. The substance ratio of these elements is defined within specific ranges to optimize battery performance.

Furthermore, the patent application details the volume resistivity requirements for the positive electrode active material when compressed to 3.5 g/cm3. It also specifies the concentration ratios of niobium and titanium at the grain boundary between primary particles, as well as the particle size distribution width and average particle size. The application extends to a lithium-ion secondary battery incorporating the disclosed positive electrode active material, emphasizing the importance of these material characteristics in enhancing battery efficiency and performance.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies