硫酸铁辅助氧化焙烧回收废旧磷酸铁锂电池中锂的工艺研究

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关键词：废旧磷酸铁锂（LFP）电池；硫酸铁；氧化焙烧；优先提锂

中图分类号：X734 文献标识码：A 文章编号：1008-9500（2025）12-0001-04DOI： 10.3969/j.issn.1008-9500.2025.12.001

Abstract： The priority lithium extraction processusing iron sulfate asistedoxidation roasting-waterleaching is developed for the recycling of wasteLiFePO （LFP）batteries，the effects of roasting temperature，material ratio and roasting time on lithium leaching rate are investigated，andthe mechanism isanalyzed using X-Ray Difraction （XRD）and Scanning Electron Microscopy （SEM）.The results show that under the optimal process conditions of calcination temperature of 500 C ，material ratio of O.75，and calcination time of 5h，the lithiumleaching rate is 92.44% . Characterization analysis shows that iron sulfate can convert lithium in LFP into water leachableLi -2′ SO 4 through calcination reaction，but the Li3Fe2（PO4）3 generated byLFPoxidation can make it dificult to leach out some lithium.This study provides theoretical and technical references for the efficient resource utilization of waste LFP batteries.

Keywords： waste LiFePO 4 （LFP） batteries; iron sulfate; oxidation roasting; prioritize lithium extraction

随着新能源汽车和储能产业的快速发展，磷酸铁锂（ LiFePO4 ，LFP）电池凭借高安全性、长循环寿命和低成本优势，在动力电池与储能领域得到广泛应用[1-2]。（剩余3754字）