欢迎访问过程工程学报, 今天是

过程工程学报 ›› 2017, Vol. 17 ›› Issue (4): 845-852.DOI: 10.12034/j.issn.1009-606X.216358

• 环境与能源 • 上一篇    下一篇

锂离子电池正极废料中有价元素的选择性回收及其动力学模型

宋佳丽1,2，  孙 峙2*，  高文芳1,2，  王 瑛2，  林 晓2，  曹宏斌1,2   

  1. 1. 天津大学化工学院精馏技术国家工程研究中心，天津 300072：2. 中国科学院过程工程研究所环境技术与工程研究部，北京 100190
  • 收稿日期:2016-11-29 修回日期:2017-02-03 出版日期:2017-08-20 发布日期:2017-08-16
  • 通讯作者: 孙峙 sunzhi@ipe.ac.cn
  • 基金资助:
    国家科技支撑计划;中国博士后科学基金资助项目;中国科学院“率先行动”百人计划;上海电子废弃物资源化产学研合作开发中心开放基金

Selective Recovery and Kinetics of Valuable Elements from Waste Lithium-ion Battery Cathodes

Jiali SONG1,2,  Zhi SUN2*,  Wenfang GAO1,2,  Ying WANG2,  Xiao LIN2,  Hongbin CAO1,2   

  1. 1. National Engineering Research Center of Distillation Technology, Sch. Chem. Eng. Technol. Tianjin University, Tianjin 300072, China; 
    2. Division of Environment Technology and Engineering, Institute of Process Engineering, CAS, Beijing 100190, China
  • Received:2016-11-29 Revised:2017-02-03 Online:2017-08-20 Published:2017-08-16

PDF

摘要： 以LiNi1/3Co1/3Mn1/3O2正极片生产废料为原料，用实验室自行研发的有机酸浸取剂IPE-A分离正极片中的铝箔，并对其中的有价元素进行选择性回收. 结果表明，浸取剂IPE-A浓度3.5 mol/L、还原剂H2O2 4%(?)、固液比40 g/L、60℃水浴加热、反应40 min时，Li的浸出率为98.17%，Ni, Co, Mn的浸出率分别达93.45%, 94.54%, 96.41%，正极废料中铝箔集流体中的Al浸出率仅为2.07%，达到了很好的分离回收效果. 采用Avrami方程描述浸取剂IPE-A浸出反应的动力学，浸出Ni, Co, Mn, Li的活化能分别为36.30, 36.71, 36.47, 33.21 kJ/mol，化学反应为浸出过程的控速步骤.

关键词: LiNi1/3Co1/3Mn1/3O2, 正极废料, 选择性回收, 浸出, 动力学

Abstract: The IPE-A, self-developed organic acid leaching agent, was used to leach the valuable metals and separate Al foil from the LiNi1/3Co1/3Mn1/3O2 cathode scrap of production waste. The results showed that the best recovery conditions were as follows: organic acid IPE-A concentration of 3.5 mol/L, the H2O2 concentration of 4%(?), solid to liquid ratio of 40 g/L, reaction temperature of 60℃ and reaction time of 40 min. The leaching rates of Ni, Co, Mn and Li reached 93.45%, 94.54%, 96.41% and 98.17% respectively, while the leaching rate of Al was only 2.07%, which can be neglected, and the positive cathode material and aluminum foil can be separated well. Avrami equation could be used to correlate the experimental data of the leaching reaction, and the activation energies of Ni, Co, Mn, Li were 36.30, 36.71, 36.47, 33.21 kJ/mol. The reaction velocity was controlled by chemical reaction step.

Key words: LiNi1/3Co1/3Mn1/3O2, waste lithium-ion battery cathodes, selective recovery, leaching, kinetics