TY - JOUR
T1 - Selective Recovery of Li and Fe from Spent Lithium-Ion Batteries by an Environmentally Friendly Mechanochemical Approach
AU - Fan, Ersha
AU - Li, Li
AU - Zhang, Xiaoxiao
AU - Bian, Yifan
AU - Xue, Qing
AU - Wu, Jiawei
AU - Wu, Feng
AU - Chen, Renjie
N1 - Publisher Copyright:
Copyright © 2018 American Chemical Society.
PY - 2018/8/6
Y1 - 2018/8/6
N2 - Recycling of spent LiFePO4 batteries has drawn recent attention relating to recovering their high contents of rare elements and negating potential negative environmental effects of their disposal. However, the stable crystal structure of LiFePO4 materials has prevented the development of a recycling process with high selectivity and extraction efficiency. We report the selective extraction of Fe and Li from spent LiFePO4 batteries via an environmentally friendly mechanochemical process with oxalic acid. With the use of a mechanochemical treatment and water leaching, the Li extraction efficiency can be improved to 99%. Furthermore, 94% of Fe can be simultaneously recovered as FeC2O4·2H2O. To understand the reaction mechanism and determine the optimum reaction conditions, we investigated various parameters, including the LiFePO4 to oxalic acid mass ratio, rotation speed, milling time, and ball-to-powder mass ratio. Moreover, metal ions from the water leaching process were recovered by chemical precipitation. This study provides an efficient and selective process for recovery of valuable metals from spent LiFePO4 materials.
AB - Recycling of spent LiFePO4 batteries has drawn recent attention relating to recovering their high contents of rare elements and negating potential negative environmental effects of their disposal. However, the stable crystal structure of LiFePO4 materials has prevented the development of a recycling process with high selectivity and extraction efficiency. We report the selective extraction of Fe and Li from spent LiFePO4 batteries via an environmentally friendly mechanochemical process with oxalic acid. With the use of a mechanochemical treatment and water leaching, the Li extraction efficiency can be improved to 99%. Furthermore, 94% of Fe can be simultaneously recovered as FeC2O4·2H2O. To understand the reaction mechanism and determine the optimum reaction conditions, we investigated various parameters, including the LiFePO4 to oxalic acid mass ratio, rotation speed, milling time, and ball-to-powder mass ratio. Moreover, metal ions from the water leaching process were recovered by chemical precipitation. This study provides an efficient and selective process for recovery of valuable metals from spent LiFePO4 materials.
KW - Mechanochemical method
KW - Oxalic acid
KW - Spent LiFePO batteries
KW - Water leaching
UR - http://www.scopus.com/inward/record.url?scp=85050497114&partnerID=8YFLogxK
U2 - 10.1021/acssuschemeng.8b02503
DO - 10.1021/acssuschemeng.8b02503
M3 - Article
AN - SCOPUS:85050497114
SN - 2168-0485
VL - 6
SP - 11029
EP - 11035
JO - ACS Sustainable Chemistry and Engineering
JF - ACS Sustainable Chemistry and Engineering
IS - 8
ER -
