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首页> 外文会议>International conference on environmental biotechnology and materials engineering;EBME 2011 >Preparation of LiCoO2 from Cathode Materials of Spent Lithium Ion Batteries
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Preparation of LiCoO2 from Cathode Materials of Spent Lithium Ion Batteries

机译：由废锂离子电池的正极材料制备LiCoO2

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Preparation of LiCoO2 cathode materials from spent lithium ion batteries are presented. The processes contain reduction, separation, precipitation, regeneration. The optimum conditions of recovery are: the calcination temperature is 500°C, the volume rate of sulfuric acid and the water reaches 0.375, the hightest leach-ing rate of cobalt is 43.53％. According to the solubility of oxalate, ammonium oxalate is choiced as precipitation agent. The investigation of X-ray diffraction(XRD), scanning electron microscopy(SEM), charge-discharge testes at voltage ranges rate from 2.8V to 4.2V versus Li, 0.2 C rate are performed. The results reveal that the regenerative LiCoO2 is pure phase, initial discharge capacity is 128.63 mAh-g-1, after 50 cycles the discharge capacity is 118.61 mAh-g-1, capacity retention rate is 92.21％. The regenerative LiCoO2 exhibits excellent electrochemical performance and stability. The materials may find promising applications in lithium ion batteries.
机译：介绍了用废锂离子电池制备LiCoO2正极材料的方法。这些过程包括还原，分离，沉淀，再生。最佳的回收条件是：煅烧温度为500℃，硫酸和水的体积比为0.375，钴的最高浸出率为43.53％。根据草酸盐的溶解度，选择草酸铵作为沉淀剂。进行了X射线衍射（XRD），扫描电子显微镜（SEM），电压范围为2.8V至4.2V，相对于Li，0.2 C的充放电试验。结果表明，再生的LiCoO2为纯相，初始放电容量为128.63 mAh-g-1，50次循环后放电容量为118.61 mAh-g-1，容量保持率为92.21％。再生的LiCoO2具有出色的电化学性能和稳定性。该材料可能会在锂离子电池中找到有前途的应用。

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