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超威电源集团有限公司

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№ CN122930860AInvention
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一种硫酸铁钠正极材料及其分级研磨干法制备工艺

本发明涉及一种硫酸铁钠正极材料及其分级研磨干法制备工艺。本发明制备工艺包括：首先，将铁源、钠源和碳源按比例加入球磨机中进行一级粗磨，通过大尺寸介质的高冲击力和机械力化学作用，实现碳源的预包覆；然后，将粗磨料移至干法砂磨机中进行二级精磨，通过小尺寸介质的高剪切力进行精细化研磨，将颗粒尺寸降低至亚微米级，并进一步均匀化碳包覆层；最后经烧结、粉碎分级、除磁等工序，得到硫酸铁钠正极材料成品。本发明能够大幅缩短了研磨时间、降低了球料比和设备磨损，有效解决了碳源上浮问题，显著提升了产量，降低了材料成本，制得的硫酸铁钠正极材料克容量可达90‑95 mAh/g，具有良好的电化学性能和循环稳定性，易于规模化生产。

❖超威电源集团有限公司程启和; 刘月学; 刘孝伟; 曹凤阳; 魏翔; 陈艳阳; 邱瑛Oct 16, 2026§ 2/10 ClaimsH01M 4/36 (2006.01), H01M 4/58 (2010.01), H01M 4/62 (2006.01) +736