Introduction: Why has a “common chemical” moved into the heart of the new-energy industry? If you have ever worked in agriculture, manganese sulfate monohydrate is likely familiar—it is widely used to supplement manganese and support crop growth. Yet few would have imagined that, as new-energy vehicles dominate the roads and energy-storage stations stabilize power grids, this traditional chemical has quietly entered the core of the new-energy supply chain, becoming a critical