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.

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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 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

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

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

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.