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A low-toxicity and high-efficiency deep eutectic solvent for the separation of aluminum foil and cathode materials from spent lithium-ion batteries

Wang, Mengmeng, Tan, Quanyin, Liu, Lili, Li, Jinhui·2019·Journal of Hazardous Materials

Abstract

The separation of cathode materials from aluminum (Al) foil is a key issue worthy of attention in the process of resource utilization of spent lithium-ion batteries (LIBs). Traditional technologies for the Al foil and cathode materials separation have the disadvantages of the use of corrosive acid/alkali, release of HF hazards, and environment and healthy risks of the toxicity reagent. In this study, a low-toxicity, high-efficiency, and low-cost deep eutectic solvent (DES), choline chloride-glycerol, was synthesized and applied to solving the separation dilemma of Al foil and cathode materials in spent LIBs. The experimental results show that separation of the Al foil and cathode materials can be achieved under optimal conditions designed by the response surface method: heating temperature 190 ℃, choline chloride: glycerol molar ratio 2.3:1, and heating time 15.0 min; the peeling percentage of cathode material can reach 99.86 wt%. Mechanism analysis results confirm that the separation of Al foil and cathode materials was the result of the deactivation of the organic binder polyvinylidene fluoride (PVDF), which can be attributed to an alkali degradation process caused by the attack of the hydroxide of choline chloride on the acidic hydrogen atom in PVDF.

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Metadata

Authors
Wang, M., Tan, Q., Liu, L., & Li, J.
Venue
Journal of Hazardous Materials
Publisher
Elsevier BV
Published
2019-12
Volume
380
Pages
120846
ISSN
0304-3894 (ISSN-L)
OpenAlex
W2954923082
Cited by
230
References
5
FWCI
10.75
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: A low-toxicity and high-efficiency deep eutectic solvent for the separation of aluminum foil and cathode materials from spent lithium-ion batteries. https://app.cochat.ai/papers/10.1016/j.jhazmat.2019.120846
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Wang, M., Tan, Q., Liu, L., & Li, J. (2019). A low-toxicity and high-efficiency deep eutectic solvent for the separation of aluminum foil and cathode materials from spent lithium-ion batteries. Journal of Hazardous Materials. https://doi.org/10.1016/j.jhazmat.2019.120846

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