The United States Patent and Trademark Office (USPTO) has granted patent US12586817B2 for a "Polysulfide-polyoxide electrolyte membrane for energy storage device." The patent, assigned to The University of Akron, details a polymer electrolyte membrane comprising a copolymer network of polyoxide and polysulfide. A key innovation is a prelithiation process involving deep discharging the battery within a specific voltage range (-0.5 V to 5.0 V) to enhance lithium ion storage within the membrane.

This patent grant is primarily an intellectual property event and does not impose direct regulatory obligations on companies. However, it signifies a new technological development in energy storage, particularly for battery technologies. Companies involved in battery manufacturing or energy storage research may need to assess this patent for potential licensing opportunities or to ensure their own innovations do not infringe upon its claims. The filing date was September 30, 2022, and the grant date is March 24, 2026.