Sumitomo Metal Mining has patented a cathode active material for lithium ion batteries. The material includes lanthanum compound particles with a perovskite-type structure dispersed on surfaces of secondary particles, enhancing electron conductivity without reducing battery capacity. The content of lanthanum is between 0.1% to 5% by mass. 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 May 2024 was 40%. Grant share is based on the ratio of number of grants to total number of patents.
Cathode active material for lithium ion secondary battery
A recently granted patent (Publication Number: US12015154B2) discloses a cathode active material for a lithium-ion secondary battery. The material consists of a lithium transition metal-containing oxide structured by secondary particles composed of multiple primary particles. Lanthanum compound particles with a perovskite-type structure are dispersed on the surfaces of the secondary particles or within the gaps and grain boundaries of the primary particles. These lanthanum compound particles have a cross-sectional average particle size of 0.70 µm or less, contributing to the efficiency and performance of the battery.
Furthermore, the patent claims specify the distribution and characteristics of the lanthanum compound particles within the cathode active material. The number of lanthanum compound particles per unit area of the secondary particle surfaces and cross-sections falls within specific ranges, ensuring optimal composition and functionality. Additionally, the content of lanthanum within the entire cathode active material is defined to be between 0.1% to 5% by mass. The inclusion of other metal elements like nickel, cobalt, and manganese in the lanthanum compound particles further enhances the properties of the cathode active material. This innovative material is intended for use in lithium-ion secondary batteries, where it can serve as a high-performance cathode material, contributing to the overall efficiency and longevity of the battery system.
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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 across the world’s largest industries.
