废锂电池负极全组分绿色回收与再生

doi:10.11896/j.issn.1005-023X.2018.20.030

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Abstract 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.

Key words： spent lithium ion batteries anode all-components trifluoroacetic acid recovery regeneration

Published: 22 November 2018

CLC number:

X705

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	CHENG Qian
	ZHANG Jing

Cite this article:

CHENG Qian,ZHANG Jing. Green Recovery and Regeneration of All-components of the Anode from Spent Lithium Ion Batteries[J]. Materials Reports, 2018, 32(20): 3667-3672.

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http://www.mater-rep.com/EN/10.11896/j.issn.1005-023X.2018.20.030 OR http://www.mater-rep.com/EN/Y2018/V32/I20/3667

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