广州化学2024，Vol.49Issue(3)：36-40,5.DOI:10.16560/j.cnki.gzhx.20240310
废旧磷酸铁锂脱锂后的铁磷渣锂吸附性能
Lithium Adsorption Properties of Ferro-phosphorus from Delithiated Spent Lithium Iron Phosphate
摘要
Abstract
Based on ferro-phosphorus obtained from delithiated spent lithium iron phosphate as lithium-ion sieve and high s Na/Li ratio of sodium sulfate brine as raw material,the effects of the amount of reducing agent,concentration of lithium,the ratio of lithium to sodium,and the temperature on the lithium adsorption performance of iron phosphorus slag were systematically investigated.The results show that the lithium adsorption capacity of ferro-phosphorus is improved with the increase of the dosage of reducing agent,concentration of lithium,the ratio of lithium to sodium,and the adsorption temperature.Besides,there is a positive correlation between selective coefficient of Li/Na and Na/Li ratio,while a negative correlation between selective coefficient of Li/Na and adsorption temperature.After five adsorption-desorption cycles,the dissolution rates of adsorption and desorption processes are lower than 0.15% and 0.002%,respectively.In addition,the lithium adsorption capacity of ferro-phosphorus remains as 2.7 mmol/g and the selective coefficient of Li/Na keeps at 3.88,indicating the excellent lithium adsorption performance and cycling performance.关键词
铁磷渣/锂离子筛/高钠锂比/锂吸附性能/选择系数Key words
ferro-phosphorus/lithium-ion sieve/high Na/Li ratio/lithium adsorption capacity/selective coefficient分类
化学化工引用本文复制引用
李立平,黄铿齐,李煜乾,黄司平..废旧磷酸铁锂脱锂后的铁磷渣锂吸附性能[J].广州化学,2024,49(3):36-40,5.基金项目
国家重点研发计划青年科学家项目(2022YFC2906000) （2022YFC2906000）
