化工环保2025，Vol.45Issue(2)：241-247,7.DOI:10.3969/j.issn.1006-1878.2025.02.011
超声波辅助葡萄糖还原酸浸法回收废旧磷酸铁锂电池中的Li和Fe
Recycling of Li and Fe from waste lithium iron phosphate batteries by ultrasonic-assisted glucose reduction and acid leaching method
摘要
Abstract
Ultrasonic-assisted glucose reduction and acid leaching method was used to recover Li and Fe from waste lithium iron phosphate(LFP)batteries.The effects of sulfuric acid concentration,glucose concentration,ratio of leaching liquid volume to positive material mass(liquid-solid ratio),temperature,time,and other factors on the leaching rates of Li and Fe in the conventional leaching process were analyzed.Changes in the leaching rate of Li and Fe before and after ultrasonic-assisted treatment were compared.The experimental results show that under the conditions of H2SO4 concentration of 2 mol/L,glucose concentration of 2.0 mol/L,liquid-solid ratio of 15 mL/g,temperature of 70℃,and leaching time of 90 min,the leaching rates of Li and Fe are 88.25%and 90.13%,respectively.Compared with the conventional leaching process,the ultrasonic-assisted process can not only shorten the leaching time but also increase the leaching rates of Li and Fe.Under the conditions of H2SO4 concentration of 2 mol/L,glucose concentration of 2.0 mol/L,liquid-solid ratio of 15 mL/g,temperature of 70℃,ultrasonic time of 60 min,and ultrasonic power of 70 W,the leaching rates of Li and Fe are 95.36%and 95.83%,respectively.The leaching kinetics of Li and Fe conform to the unreacted shrinkage kernel model,in which the leaching of Li and Fe is mainly controlled by internal diffusion.关键词
废旧磷酸铁锂电池/正极材料/还原浸出/超声波辅助浸出/浸出动力学Key words
waste lithium iron phosphate battery/cathode material/reduction and leaching/ultrasonic-assisted leaching/leaching kinetics分类
环境科学引用本文复制引用
吴昂基,张荣良,王硕渊,高逸凡,潘雯,张威,杨瑞祥..超声波辅助葡萄糖还原酸浸法回收废旧磷酸铁锂电池中的Li和Fe[J].化工环保,2025,45(2):241-247,7.基金项目
江苏省研究生科研创新项目(KYCX23_3870). （KYCX23_3870）
