【摘要】 研究了苹果酸作为浸出剂和还原剂，H₂O₂作为辅助还原剂，还原浸出废旧锂电池中的Ni、Co、Mn等有价金属，并探讨了不同反应条件对有价金属浸出效率的影响。同时，采用溶胶-凝胶法，以浸出液为原料，原位合成了LiNi_1/3Co_1/3Mn_1/3O₂三元正极材料。通过X射线衍射（XRD）、扫描电镜（SEM）和电化学测试对再合成三元正极材料进行结构和电化学性能的表征。结果表明，在苹果酸浓度为2.5 mol/L、固液比120 g/L、浸出时间80 min、浸出温度90℃、H₂O₂用量10%（体积分数）的浸出条件下，有价金属的复合浸出率达到97.5%。同时，再合成材料具有良好的结晶性能，且再合成材料在1C充放电100次后比容量为103.4 mAh/g,容量保持率85.5%,经倍率充放电后，容量恢复率为92.32%。更多还原

【Abstract】 In this work, the valuable metal was recycled and reused by using malic acid as leaching agent and H₂O₂ as reducing agent, and the effect of different factors on the wet leaching efficiency of valuable metals was investigated. Meanwhile, the sol-gel method was utilized to re-synthesized LiNi_1/3Co_1/3Mn_1/3O₂. And the re-synthesized materials were characterized by X-ray diffraction（XRD）, scanning electron microscopy（SEM） and electrochemical tests. The results showed that the wet leaching efficiency of the valuable metals Li, Ni, Co and Mn was reached 97.5% at the conditions of the malic acid concentration of 2.5 mol/L, the solid-liquid ratio of 120 g/L, the synthesized time of 80 min, the synthesized temperature of 90 ℃, and the H₂O₂ amount of 10 vol%. The re-synthesized materials also shows a good crystallization property. After 100 cycles of charge and discharge at 1 C, the specific capacity is 103.4 mAh/g, the capacity retention rate is 85.5%, and the capacity recovery rate is 92.32% after rate charge and discharge.更多还原