Recovery of cathode materials and Al from spent lithium-ion batteries by ultrasonic cleaning

Waste Management
Li-Po HeJian-Guo Yu

Abstract

Cathode materials are difficult to separate from Al-foil substrates during the recycling of spent lithium-ion batteries (LIBs), because of the strong bonding force present. In this study, ultrasonic cleaning was used to separate and recycle these cathode materials. The mechanism of separation was ascribed to the dissolution of polyvinylidene fluoride (PVDF) and the cavitation caused by ultrasound. Based on this mechanism, the key parameters affecting the peel-off efficiency of cathode materials from Al foil was identified as solvent nature, temperature, ultrasonic power, and ultrasonic time. The peel-off efficiency of cathode materials achieved ∼99% under the optimized conditions of N-methyl-2-pyrrolidone (NMP) cleaning fluid, 70°C process temperature, 240W ultrasonic power, and 90min of ultrasonication. The cathode materials separated from Al foil displayed a low agglomeration degree, which is beneficial to the subsequent leaching process. Finally, a new, environmentally-sound process was proposed to efficiently recycle cathode materials and Al from spent LIBs, consisting of manual dismantling, ultrasonic cleaning, and picking.

References

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Sep 25, 2009·Chemosphere·Jinhui LiChein-Chi Chang
Jan 10, 2013·Journal of Hazardous Materials·Yaqing WengChangyin Jiang
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Citations

Aug 21, 2018·Chemical Society Reviews·Xiaoxiao ZhangRenjie Chen
Dec 16, 2017·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Wenxuan ZhangJuwen Huang
Nov 25, 2020·Journal of Hazardous Materials·Guangwen ZhangWeining Xie
Feb 28, 2021·The Science of the Total Environment·Shiqiang SunJuwen Huang
May 1, 2021·Polymers·Jean E MarshallVannessa Goodship
Jun 2, 2021·Waste Management & Research : the Journal of the International Solid Wastes and Public Cleansing Association, ISWA·Mohammad Mahdi TorabianAlireza Bazargan
Jun 26, 2021·Journal of Environmental Management·Lívia Salles MartinsDenise Crocce Romano Espinosa
Aug 14, 2021·Journal of Environmental Management·Zhilin HuYijun Chen

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