废旧磷酸铁锂电池集流体分离与正极材料再生

利用NaOH碱溶去除集流体粘结剂高效分离LiFePO4正极材料，超声回收铝箔，利用固相法实现废旧LiFePO4的再生。当NaOH为0.8 mol/L，固液比20 mL/g，40℃反应10 min，正极材料的分离率达到99.78%，超声1 min后铝箔回收率为76%。机械活化500r/5h，添加10 wt%纯LiFePO4固相再生材料的最高放电比容量为新材料最高放电比容量的94.75%，60次循环测试后为初始放电比容量的88.62%。

Waste lithium iron phosphate battery current collectors separation and cathode material regeneration

The LiFePO4 cathode material was efficiently separated by NaOH alkaline solution-removing fluid collecting binder, and the aluminium foil was recovered by ultrasound. The waste LiFePO4 was regenerated by the solid phase method. When NaOH was 0.8 mol /L, the solid-liquid ratio was 20 mL/g, and the reaction was carried out at 40℃ for 10 min, the separation rate of anode material reached 99.78%, and the recovery rate of aluminium foil was 76% after 1 min of ultrasound. After mechanical activation of 500r/5h, the highest specific discharge capacity of 10 wt% pure LiFePO4 solid phase regenerated material was 94.75% of the highest specific discharge capacity of the new material, and the capacity retention rate was 88.62% after 60 cycles of test.