中钢天源：公司拥有35000吨电池级四氧化三锰产能，产品可用于锰酸锂、磷酸锰铁锂等电池材料中

Group 1 - The company Zhonggang Tianyuan (002057.SZ) has a production capacity of 35,000 tons of battery-grade manganese tetroxide, which is a significant upstream material in the manganese-based cathode industry chain [2] - The products can be utilized in lithium manganese oxide and lithium iron phosphate materials for batteries, indicating the company's role in the battery materials sector [2]