A green process for phosphorus recovery from spent LiFePO4 batteries by transformation of delithiated LiFePO4 crystal into NaFeS2

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 固体废弃物处理与资源化实验室

	A green process for phosphorus recovery from spent LiFePO4 batteries by transformation of delithiated LiFePO4 crystal into NaFeS2
	He, Kai; Zhang, Zhi-Yuan; Zhang, Fu-Shen
刊名	JOURNAL OF HAZARDOUS MATERIALS
	2020-08-05
卷号	395 页码:1-10
关键词	Spent LiFePO4 battery Solid waste recycling Phosphorus recovery NaFeS2
ISSN号	0304-3894
英文摘要	Recovery of high-content and valuable elements including phosphorus (P) is critical for recycling of spent LiFePO4 battery, but P recovery is challengeable due to the poor solubility of lithium phosphate and iron phosphate. This study compared two strategies to recover P by adopting sulfide salt to induce P dissolution, i.e., recovery of P directly from LiFePO4, and step-by-step recovery of Li then P. The results revealed that the second strategy was more efficient because of the higher recovering efficiency and selectivity. Accordingly, an acid-free process to recover P was successfully demonstrated. Li-recovery efficiency of 97.5 % was reached at a leaching time of 65 min, and nearly 100 % P-recovery efficiency was reached at 5 h. Mechanism analysis revealed that the transforming of delithiated LiFePO4 crystal to NaFeS2 was mainly responsible for P dissolution. Thermodynamic analysis and density functional theory calculation further proved the transformation reaction, and a stepwise-transformation mechanism was proposed. In addition, P was reclaimed in the form of soluble phosphate salts. The process is especially appealing due to its environmental and economic benefits for recycling spent LiFePO4 batteries.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44560]
专题	生态环境研究中心_固体废弃物处理与资源化实验室
推荐引用方式 GB/T 7714	He, Kai,Zhang, Zhi-Yuan,Zhang, Fu-Shen. A green process for phosphorus recovery from spent LiFePO4 batteries by transformation of delithiated LiFePO4 crystal into NaFeS2[J]. JOURNAL OF HAZARDOUS MATERIALS,2020,395:1-10.
APA	He, Kai,Zhang, Zhi-Yuan,&Zhang, Fu-Shen.(2020).A green process for phosphorus recovery from spent LiFePO4 batteries by transformation of delithiated LiFePO4 crystal into NaFeS2.JOURNAL OF HAZARDOUS MATERIALS,395,1-10.
MLA	He, Kai,et al."A green process for phosphorus recovery from spent LiFePO4 batteries by transformation of delithiated LiFePO4 crystal into NaFeS2".JOURNAL OF HAZARDOUS MATERIALS 395(2020):1-10.