From waste to material strategy: A closed-loop regeneration process of spent LiFePO4 batteries
- 点击次数：
- 影响因子：9.0
- DOI码：10.1016/j.seppur.2024.130502
- 发表刊物：SEPARATION AND PURIFICATION TECHNOLOGY
- 关键字：Spent LiFePO4 batteries;
Hot-acid leaching;
Cu/Al/F removal;
Precursors co-precipitation;
LiFePO4/C materials regeneration
- 摘要：A closed-loop regeneration route to recover valuable elements from spent LiFePO4 batteries is proposed. After hot-acid leaching, the leaching rates of Li, Fe and P are above 99.8 %, and the graphite powder retain in the residue with grade of 93.33 %. With iron powder cementation, 99.96 % Cu is removed from acid leaching solution to obtain sponge copper. And then 96.67 %Al and 89.30 %F are precipitated in the form of AlPO4(s) and FeF3(s) at pH = 3.75. Li, Fe and P within the purified solution are prepared as LiFePO4 precursors by coprecipitation method, and finally LiFePO4/C materials are synthesized after two-stage calcination. The recycled LiFePO4/C materials demonstrate excellent electrochemical performance with a discharge capacity of 153.1 mAh & sdot;g- 1 at 0.1C and a capacity retention of 94.0 % after 500 cycles at 1C. The present recycling process provides a strategy for short and efficient regeneration of spent LiFePO4 batteries.
- 论文类型：期刊论文
- 论文编号：130502
- 学科门类：工学
- 一级学科：冶金工程
- 文献类型：J
- 卷号：359
- 是否译文：否
- 发表时间：2025-06-22
- 收录刊物：SSCI、SCI、EI
