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一步法回收锂离子电池三元正极材料及其性能影响

王媛 杨茹 缪建麟 赵瑞瑞

王媛, 杨茹, 缪建麟, 赵瑞瑞. 一步法回收锂离子电池三元正极材料及其性能影响[J]. 华南师范大学学报(自然科学版), 2021, 53(1): 36-41. doi: 10.6054/j.jscnun.2021006
引用本文: 王媛, 杨茹, 缪建麟, 赵瑞瑞. 一步法回收锂离子电池三元正极材料及其性能影响[J]. 华南师范大学学报(自然科学版), 2021, 53(1): 36-41. doi: 10.6054/j.jscnun.2021006
WANG Yuan, YANG Ru, MIAO Jianlin, ZHAO Ruirui. One-Step Recycling of Trinary Cathode Materials in Lithium Ion Batteries and the Impact on Their Performance[J]. Journal of South China normal University (Natural Science Edition), 2021, 53(1): 36-41. doi: 10.6054/j.jscnun.2021006
Citation: WANG Yuan, YANG Ru, MIAO Jianlin, ZHAO Ruirui. One-Step Recycling of Trinary Cathode Materials in Lithium Ion Batteries and the Impact on Their Performance[J]. Journal of South China normal University (Natural Science Edition), 2021, 53(1): 36-41. doi: 10.6054/j.jscnun.2021006

一步法回收锂离子电池三元正极材料及其性能影响

doi: 10.6054/j.jscnun.2021006
基金项目: 

国家质量监督检验总局科技计划项目 2017QK146

详细信息
    通讯作者:

    赵瑞瑞,Email: zhaoruirui@m.scnu.edu.cn

  • 中图分类号: O611

One-Step Recycling of Trinary Cathode Materials in Lithium Ion Batteries and the Impact on Their Performance

  • 摘要: 采用直接一步法回收废旧锂离子电池中的三元正极材料LiNi0.5Co0.2Mn0.3O2,将拆解得到的三元废料经分离、热解处理后进行酸浸,对酸浸溶液进行元素测定后补加Ni、Co、Mn源,使其物质的量之比符合n(Ni)∶n(Co)∶n(Mn)=5∶2∶3. 调整后的溶液直接与草酸钠溶液进行共沉淀,得到草酸盐前驱体,最后与锂源混合,烧结得到三元再生正极材料. 结果表明:再生正极材料的首次放电容量最高达162 mAh/g,充放电100次后的容量保持率接近88%. 但如果材料中杂质元素含量过高,则会对材料电化学性能造成负面影响. 该方法避免了传统方法中将金属元素逐一分离回收所造成的资源浪费和能源损耗,且制备得到的材料具有较高附加值,具有良好的商业化应用前景.
  • 图  1  添加不同元素前驱体的XRD图

    Figure  1.  The XRD patterns of different precursors

    图  2  烧结材料的XRD图谱及(003)面的放大部分

    Figure  2.  The XRD patterns of the final products and the enlarged part of (003) diffraction peak

    图  3  前驱体及烧结材料的SEM图

    Figure  3.  The SEM images for precursor and the final materials

    图  4  回收材料的电化学性能

    Figure  4.  The electrochemical properties of the recycled materials

    图  5  一步法共沉淀反应的机理示意图

    Figure  5.  The reaction mechanism of the direct co-precipitation process

    表  1  几种样品的ICP结果

    Table  1.   The ICP results of the obtained samples

    样品 物质的量/mol
    Li Ni Mn Co Mg Al
    NCM1 1.000 0 0.491 0 0.308 4 0.195 6 0.001 8 0.000 3
    NCM2 1.000 0 0.493 0 0.307 4 0.195 6 0.001 6 0.001 7
    NCM3 1.000 0 0.494 6 0.307 6 0.195 6 0.001 6 0.003 1
    NCM4 1.000 0 0.492 3 0.308 1 0.195 8 0.005 8 0.000 3
    NCM5 1.000 0 0.487 0 0.307 6 0.196 5 0.011 1 0.000 4
    注:以Li+浓度1 mol/L为基准,对其他元素进行核算.
    下载: 导出CSV
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出版历程
  • 收稿日期:  2020-03-26
  • 网络出版日期:  2021-03-24
  • 刊出日期:  2021-02-25

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