Sumitomo Metal Mining has patented a precursor for non-aqueous electrolyte secondary batteries, enhancing battery performance. By adjusting pH levels in the manufacturing process, a manganese composite hydroxide is created, improving battery characteristics. GlobalData’s report on Sumitomo Metal Mining gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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 March 2024 was 42%. Grant share is based on the ratio of number of grants to total number of patents.
Manganese composite hydroxide precursor for non-aqueous electrolyte secondary batteries
A recently granted patent (Publication Number: US11973223B2) discloses a manganese composite hydroxide represented by a specific chemical formula, which serves as a precursor for positive electrode active materials in non-aqueous electrolyte secondary batteries. The composite hydroxide features a unique structure with a secondary particle having a high concentration layer of cobalt and/or manganese, contributing to enhanced battery performance. Additionally, the patent outlines a detailed process for producing this manganese composite hydroxide, involving specific conditions such as nucleation in a low-oxygen atmosphere and adjusting ammonia concentration during particle growth.
Furthermore, the patent describes a process for producing a positive electrode active material for non-aqueous electrolyte secondary batteries using the manganese composite hydroxide. This process involves mixing the composite hydroxide with a lithium compound and firing the mixture in an oxidizing atmosphere at a specific temperature range. The patent also emphasizes the importance of controlling the atomic ratio of lithium to other metals in the mixture and includes a heat treatment step before mixing to optimize the material's properties. Overall, the patent provides a comprehensive guide for manufacturing advanced electrode materials for high-performance batteries, highlighting the significance of specific production parameters and material compositions in achieving desired electrochemical properties.
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