非对称电容型动力电池正负极材料中回收金属

Recovery of Metal from Positive and Negative Electrode Materials of Asymmetrical Capacitive Power Battery

采取分段浸出对废弃非对称电容型动力电池进行循环回收再生处理,研究了分段浸出温度、分段反应时间、硫酸浓度、氧化剂用量和添加顺序等对浸出率的影响,并提出废旧电池循环利用流程:废旧电池材料—硫酸浸出—沉淀稀土—除钙、镁等杂质—调节浓度—沉淀制三元正极材料前驱体—制备三元正极材料—组装电池。在最佳浸出条件下,Ni、Co浸出率达到95%以上,稀土金属浸出率分别达99%。

Waste asymmetric capacitor battery was recycled by stepwise leaching.Effects of temperature,reaction time,dosage of sulfuric acid,amount of oxidant,and order of adding on leaching rate were studied.The process of waste battery recycling was put forward including sulfuric acid leaching of waste battery material,rare earth precipitation,removal of Mg and Ca,concentration adjustment,preparation of ternary cathode material precursor by precipitation,preparation of ternary cathode materials,and battery assembling.