Canada-based Manganese X Energy has been granted a US patent covering its proprietary purification process for manganese sulphate, a key material used in lithium-ion batteries for electric vehicles and stationary energy storage systems.
The patent relates to the production of high-purity manganese sulphate, a cathode precursor material used in established lithium-ion chemistries as well as emerging high-manganese formulations aimed at improving performance and reducing reliance on more costly or supply-constrained metals.
Martin Kepman, chief executive officer of Manganese X Energy, said: “The granting of our U.S. patent for high-purity manganese processing marks another significant milestone, following our recent patent acceptance in South Africa (see news release dated February 10, 2026). We continue to position Manganese X as a vertically integrated North American supplier of battery-grade manganese. This achievement reinforces the strength of our technology and our commitment to building a secure and scalable domestic supply chain.”
He added: “This patent expands our global intellectual property portfolio and supports our long-term strategy to supply high-purity manganese sulphate to the rapidly growing lithium-ion battery market. It also adds value as we advance our prefeasibility study, where we are evaluating multiple processing pathways to optimize both technical performance and economics.”
Manganese X’s Battery Hill project
The development supports the company’s wider strategy centred on its Battery Hill project in New Brunswick, Canada, described as one of the largest manganese carbonate deposits in North America. Alongside upstream resource development, the company is pursuing downstream processing and commercialisation of battery-grade materials.
Manganese X has also applied for patent protection in Canada, Mexico and Australia.
High-purity manganese sulphate is increasingly important in battery manufacturing, particularly as cell developers explore higher manganese content cathodes to lower costs and diversify supply chains. These materials are used across electric vehicles, grid-scale storage, renewable energy integration and backup power systems.
The company said it remains focused on advancing its prefeasibility study at Battery Hill, scaling its purification technology and progressing towards commercial production.
Photo: a close-up photograph of manganese ore
Credit: Shutterstock
