| 程前,张婧.废锂电池负极全组分绿色回收与再生[J].材料导报,2018,32(20):3667-3672 |
| 废锂电池负极全组分绿色回收与再生 |
| Green Recovery and Regeneration of All-components of the Anode from Spent Lithium Ion Batteries |
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| DOI：10.11896/j.issn.1005-023X.2018.20.030 |
| 中文关键词: 废锂电池 负极 全组分 三氟乙酸 回收 再生 |
| 英文关键词: spent lithium ion batteries, anode, all-components, trifluoroacetic acid, recovery, regeneration |
| 基金项目:福建省农村污水处理与用水安全工程研究中心开放基金(RST201802);福建省教育厅中青年科研项目(JAT170431);福建省科技厅引导性项目(2016H01010099) |
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| 中文摘要: |
| 以三氟乙酸溶液为溶剂,对废锂电池负极片中的铜箔、石墨及锂元素进行了综合回收试验研究,考察了不同实验条件对各组分回收效果的影响,并采用 XRD、SEM 和 FTIR 等手段对再生产物进行了表征。结果表明,经酸浸后,铜箔表面干净光亮,其回收率可达100%；石墨(锂离子浸出最佳酸浸条件下过滤所得的石墨)呈现出典型的层状结构特征,且纯度高、无杂质,其回收率约为 96.3%；在三氟乙酸浓度为 15%(体积分数)、固液比为 60 g/L、浸出温度为 40 ℃、浸出时间为 30 min的实验条件下,浸出液中锂离子的最大浸出质量分数为1.08%。经除杂后浸出液中锂元素的再生产物为纯相碳酸锂,其产率为 95.6%。实验中三氟乙酸溶剂可通过蒸馏的方式循环利用。整个工艺流程简单,绿色环保。 |
| 英文摘要: |
| For the comprehensive recovery of copper foil, graphite and lithium from the anode of spent lithium ion batteries,trifluoroacetic acid was employed as the leaching agent. The effects of different experimental conditions on the recovery rate of all-components were investigated. XRD, SEM and FTIR were used to analyze the regenerated products. The results showed that the surface of copper foil was clean and bright after acid leaching. Up to 100% copper foil could be recovered. The graphite that filtered under the optimum condition of acid leaching for Li+ exhibited typical layer structure characteristics with high purity. The recovery rate of graphite was about 96.3%. The maximum leaching rate of Li+ was 1.08% under the following leaching conditions:trifluo-roacetic acid concentration of 15% (vol%), solid-to-liquid ratio of 60 g/L, leaching temperature of 40 ℃ and the leaching time of 30 min. The regenerated product of Li was lithium carbonate with high purity after removal of impurity from leaching solution, and its yield was 95.6%. Trifluoroacetic acid could be recycled by distillation. The whole process was simple and green. |
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