Abstract
The recycling of cathode materials from spent lithium-ion battery has attracted extensive attention,but few research have focused on spent blended cathode materials.In reality,the blended materials of lithium iron phosphate and ternary are widely used in electric vehicles,so it is critical to design an effective recycling technique.In this study,an efficient method for recovering Li and Fe from the blended cathode materials of spent LiFePO4 and LiNixCoyMn1-x-yO2 batteries is proposed.First,87％Al was removed by alkali leaching.Then,91.65％Li,72.08％Ni,64.6％Co and 71.66％Mn were further separated by selective leaching with H2SO4 and H2O2.Li,Ni,Co and Mn in solution were recovered in the form of Li2CO3 and hydroxide respectively.Subsequently,98.38％Fe was leached from the residue by two stage process,and it is recovered as FePO4·2H2O with a purity of 99.5％by pre-cipitation.Fe and P were present in FePO4·2H2O in amounts of 28.34％and 15.98％,respectively.Addition-ally,the drift and control of various components were discussed,and cost-benefit analysis was used to assess the feasibility of potential application.
基金项目
National Key Research and Development Program(2019YFC1907801)
National Key Research and Development Program(2019YFC1907803)
National Key Research and Development Program(2019YFC1907804)
Natural Science Foundation of Hunan(2021JJ2020066)
Natural Science Foundation of Hunan(2020JJ4733)
National Natural Science Foundation of China(51904340)
Central South University Innovation-Driven Research Program(2023CXQD009)
NETL
NSTL
万方数据