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Lithium Carbonate Recovery from Cathode Scrap of Spent Lithium-Ion Battery: A Closed-Loop Process

Open access
Gao, Wenfang, Zhang, Xihua, Zheng, Xiaohong, Lin, Xiao, Cao, Hongbin, Zhang, Yi, Sun, Zhi·2017·Environmental Science & Technology

Abstract

A closed-loop process to recover lithium carbonate from cathode scrap of lithium-ion battery (LIB) is developed. Lithium could be selectively leached into solution using formic acid while aluminum remained as the metallic form, and most of the other metals from the cathode scrap could be precipitated out. This phenomenon clearly demonstrates that formic acid can be used for lithium recovery from cathode scrap, as both leaching and separation reagent. By investigating the effects of different parameters including temperature, formic acid concentration, H 2 O 2 amount, and solid to liquid ratio, the leaching rate of Li can reach 99.93% with minor Al loss into the solution. Subsequently, the leaching kinetics was evaluated and the controlling step as well as the apparent activation energy could be determined. After further separation of the remaining Ni, Co, and Mn from the leachate, Li 2 CO 3 with the purity of 99.90% could be obtained. The final solution after lithium carbonate extraction can be further processed for sodium formate preparation, and Ni, Co, and Mn precipitates are ready for precursor preparation for cathode materials. As a result, the global recovery rates of Al, Li, Ni, Co, and Mn in this process were found to be 95.46%, 98.22%, 99.96%, 99.96%, and 99.95% respectively, achieving effective resources recycling from cathode scrap of spent LIB.

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Metadata

Authors
Gao, W., Zhang, X., Zheng, X., Lin, X., Cao, H., Zhang, Y., & Sun, Z.
Venue
Environmental Science & Technology
Published
2017-01-27
Volume
51
Issue
3
Pages
1662-1669
ISSN
  • 0013-936X (ISSN-L)
  • 1520-5851
OpenAlex
W2575735484
Cited by
507
References
35
FWCI
28.48
Type
journal article
Language
en
Open access
green

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