摘要
研究了电池级钴酸锂在盐酸-水合肼体系中的浸出行为。结果表明,在盐酸-水合肼浸出体系中,较优的浸出工艺条件为:初始盐酸浓度0.9 mol/L,水合肼加入量/钴酸锂加入量6.25∶10(g/g),浸出温度70℃,浸出时间30 min。在该条件下,用失效锂离子电池做了验证试验,钴和锂浸出率分别为95%和99%。该工艺运行效果良好且稳定。浸出溶液成分相对单纯,利用沉淀法除去铁和铝,有利于废旧锂离子电池中有价金属的直接材料化,如钴酸锂的制备。
The leaching behavior of battery grade lithium cobalt oxide （LiCoO2） was studied in HCl-N2H2 · H2O aqueous solutions.The experimental results show that the optimal leaching condition is as follows：HCl concentration 0.9 mol/L,N2H2 · H2O to LiCoO2 ratio （g/g） 6.25∶ 10,leaching temperature 70 ℃ and leaching time 30 min.The HCl-N2H2 · H2O leaching system was applied in the treatment of spent Li-ion battery,achieving 95％ and 99％ leaching rate for cobalt and lithium respectively.This leaching technique of spent Li-ion battery is proved to be effective and stable,its application would benefit the recycling of valuable metals from spent lithium-ion battery.
出处
《矿冶》
CAS
2014年第2期80-83,共4页
Mining And Metallurgy
基金
国家自然科学基金重点资助项目(50734005)
关键词
废旧锂离子电池
水合肼
钴酸锂
浸出
spent lithium-ion battery
hydrazine hydrate
lithium cobalt oxide
leaching
