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Development of a Two-Stage Pyrolysis Process for the End-Of-Life Nickel Cobalt Manganese Lithium Battery Recycling from Electric Vehicles

School of Mechanical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
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Sustainability 2020, 12(21), 9164; https://doi.org/10.3390/su12219164
Received: 16 October 2020 / Revised: 2 November 2020 / Accepted: 3 November 2020 / Published: 4 November 2020
With the continuous promotion of electric vehicles, the pressure to scrap vehicle batteries is increasing, especially in China, where nickel cobalt manganese lithium (NCM) batteries have gradually come to occupy a dominant position in the battery market. In this study, we propose a two-stage pyrolysis process for vehicle batteries, which aims to effectively deal with the volatilization of organic solvents, the decomposition of lithium salts in the electrolyte and the removal of the separator material and polyvinylidene fluoride (PVDF) during battery recycling. By solving these issues, recycling is more effective, safe. Through thermogravimetric analysis (TGA), the pyrolysis characteristics of the battery’s internal materials are discussed, and 150 °C and 450 °C were determined as the pyrolysis temperatures of the two-stage pyrolysis process. The results show that in the first stage of pyrolysis, organic solvents EC (C4H3O3), DEC (C5H10O3) and EMC (C4H8O3) can be separated from the electrolyte. In the second stage, the pyrolysis can lead to the separator’s thermal decomposition. The gas products are alkane C2-C6, and the tar products are organic hydrocarbons C15-C36. Meanwhile, the solid residue of the battery’s internal material seems to be very homogeneous. Finally, the potential recovery value and pollution control countermeasures of the products and residues from the pyrolysis process are analyzed. Consequently, this method can effectively handle NCM vehicle battery recycling, which provides the basis for the subsequent hydrometallurgical or pyrometallurgical process for element recovery of the battery material. View Full-Text
Keywords: vehicle battery; pyrolysis; NCM battery; recycling; EOL; TGA; GC/MS; ICP vehicle battery; pyrolysis; NCM battery; recycling; EOL; TGA; GC/MS; ICP
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MDPI and ACS Style

Zhu, L.; Chen, M. Development of a Two-Stage Pyrolysis Process for the End-Of-Life Nickel Cobalt Manganese Lithium Battery Recycling from Electric Vehicles. Sustainability 2020, 12, 9164. https://doi.org/10.3390/su12219164

AMA Style

Zhu L, Chen M. Development of a Two-Stage Pyrolysis Process for the End-Of-Life Nickel Cobalt Manganese Lithium Battery Recycling from Electric Vehicles. Sustainability. 2020; 12(21):9164. https://doi.org/10.3390/su12219164

Chicago/Turabian Style

Zhu, Lingyun, and Ming Chen. 2020. "Development of a Two-Stage Pyrolysis Process for the End-Of-Life Nickel Cobalt Manganese Lithium Battery Recycling from Electric Vehicles" Sustainability 12, no. 21: 9164. https://doi.org/10.3390/su12219164

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