电池2023，Vol.53Issue(6)：692-696,5.DOI:10.19535/j.1001-1579.2023.06.023
LiFePO4锂离子电池关键材料的湿法回收
Wet recovery of main materials of LiFePO4 Li-ion battery
李云霞 1万亚锋 1王金涛 1吕正中1
作者信息
- 1. 湖北金泉新材料有限公司,湖北 荆门 448000
- 折叠
摘要
Abstract
The spent lithium iron phosphate(LiFePO4)Li-ion battery was crushed and sorted to get black powder.The black powder was recovered and regenerated by wet method,the leaching(recovery)rate of lithium,iron and phosphorus could reach more than 97%.Chemical precipitation method was used to remove copper and aluminum from the leaching solution.The iron powder replacement method could reduce the copper content to less than 0.000 1%,aluminum content could be reduced to 0.000 6%by using ammonium sulfate chemical precipitation,achieving a deep impurity removal effect.After impurity removal,the refined solution was used to synthesize battery grade anhydrous iron phosphate and lithium carbonate.LiFePO4 cathode material was further synthesized by high temperature solid phase method.The charge-discharge specific capacities of the button cell were 162.96 mAh/g and 159.31 mAh/g respectively after cycling at 0.1 C in 2.00-3.75 V,the Coulombic efficiency of the initial cycle was 97.76%.关键词
锂离子电池/磷酸铁锂(LiFePO4)/湿法回收/磷酸铁/碳酸锂/再生材料/资源化利用Key words
Li-ion battery/lithium iron phosphate(LiFePO4)/wet recovery/iron phosphate/lithium carbonate/regenerate material/resource utilization分类
信息技术与安全科学引用本文复制引用
李云霞,万亚锋,王金涛,吕正中..LiFePO4锂离子电池关键材料的湿法回收[J].电池,2023,53(6):692-696,5.
