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| Effect of Fluorine and Phosphorus Impurity on Recovery of Lithium from Spent NCM Cathode Powder by Reduction Roasting-Water Leaching Process |
| Received:September 15, 2020 Revised:September 22, 2020 |
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| DOI：doi：10.3969/j.issn.1007-7545.2020.12.009 |
| KeyWord:spent lithium-ion battery; NCM cathode powder; reduction roasting; lithium; phosphorus; fluorine |
| Author | Institution |
| Liao Caibin |
长沙矿冶研究院有限责任公司 |
| Ren Guo-xing |
中南大学 |
| Xiao Song-wen |
长沙矿冶研究院有限责任公司 |
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| Abstract: |
| Spent NCM cathode powder with/without fluorine and phosphorus impurities were treated by reduction roasting-water leaching. The results show that lithium leaching efficiency in spent NCM cathode powder containing fluorine and phosphorus impurities was significantly lower than that of pure NCM cathode powder under same experimental conditions. Fluorine and phosphorus impurities are the key factors affecting lithium recovery during reduction roasting-water leaching, which can be explained by that parts of lithium in NCM cathode powder is converted into insoluble LiF and Li3PO4 during reduction roasting process. |
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