SK Innovation has patented a cathode active material for lithium secondary batteries, comprising lithium metal oxide particles with a thiosulfate anion coating. This compound enhances chemical stability and reduces surface residues, potentially improving 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 May 2024 was 30%. Grant share is based on the ratio of number of grants to total number of patents.
Cathode active material for lithium secondary battery with thiosulfate
A recently granted patent (Publication Number: US12002950B2) discloses a cathode active material for lithium secondary batteries. The material comprises lithium metal oxide particles with a thiosulfate anion (S2O32-) formed on at least a portion of the surface. The content of the thiosulfate anion falls within a range of 100 ppb to 8,000 ppb, as measured by ion chromatography analysis. Additionally, the cathode active material may include a nickel-based lithium oxide and a surface component represented by General Formula 2, detected through Time of Flight Secondary Ion Mass Spectrometry (TOF-SIMS) analysis.
Furthermore, the patent describes a method for preparing the cathode active material, involving cleaning a preliminary lithium metal oxide particle with a washing solution containing a thiosulfate anion salt. The washed particle is then dried or annealed to obtain a lithium metal oxide particle with the desired thiosulfate anion content. The method includes specific washing treatments and the use of different amounts of thiosulfate anion salt in the washing solution. The patent also covers the application of the cathode active material in a lithium secondary battery, along with an anode and a separation layer to complete the battery structure.
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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.
