Abstract
The separation and recovery of positive active materials of retired lithium-ion batteries has high economic benefits and social significance. This study proposed a new method based on the vaporization of the positive collector of lithium-ion battery caused by underwater pulse discharge to separate positive active material from positive collector. A comprehensive experimental platform for pulse discharge was built. With the positive sheet as the load, the experiments of the vaporization of the positive collector in the positive sheet were carried out under different voltages. The energy deposited on the positive collector was calculated, and the phase changes of the positive collector were analyzed. Scanning electron microscopy and energy dispersive spectroscopy were used to analyze the filtered products after experiments. The experimental results show that the positive collector vaporizes and explodes during the discharge process. The instantaneous high temperature and high pressure generated in the vaporization process can separate the positive active material from the adhesive. And the chemical state of the obtained positive active material has not changed significantly. The results of this paper can provide scientific and experimental basis for the separation of positive active materials of lithium-ion batteries by underwater pulsed discharge.
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Acknowledgments
This work was funded by Graduate Research and Innovation Foundation of Chongqing, China (CYS22029) and Natural Science Foundation of Chongqing, China (2022NSCQ-MSX2520).
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Li, C., Dai, M., Zhou, Y., Chen, D., Kou, P. (2023). A Method for Separating Positive Active Material of Lithium-Ion Battery by Underwater Pulse Discharge. In: Xie, K., Hu, J., Yang, Q., Li, J. (eds) The Proceedings of the 17th Annual Conference of China Electrotechnical Society. ACCES 2022. Lecture Notes in Electrical Engineering, vol 1014. Springer, Singapore. https://doi.org/10.1007/978-981-99-0408-2_30
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DOI: https://doi.org/10.1007/978-981-99-0408-2_30
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