Building upon the foundation of dual carbon, the rapid growth of the new energy vehicle industry has resulted in a significant surge in both production and disposal of nickel–cobalt-manganese(NCM) lithium batteries. Simultaneously, addressing environmental concerns arising from waste polyvinyl chloride (PVC) during industrial manufacturing is imperative. In this study, an innovative PVC-NCM synergistic pyrolysis approach was investigated for recovering valuable metals. The findings demonstrated that NCM completely decomposed into metal chlorides within 60 min at 550 °C with an NCM/PVC mass ratio of 1:3. The recovery rates through water leaching were determined as follows: Ni—94.38%, Co—94.36%, Mn—95.15%, and Li—98.71%. The mechanism underlying synergistic pyrolysis revealed how PVC pyrolysis facilitated reduction reactions on NCM, leading to the formation of metal components that reacted with HCl to generate chlorides. This creative collaboration between PVC and ternary battery powder successfully achieved the objective of metal recovery while potentially mitigating PVC pollution issues. The proposed PVC-NCM synergistic pyrolysis strategy offers an economical and environmentally friendly solution for LIBs recovery, characterized by notable energy-saving benefits and absence of chemical usage.
Zhang et al. (Mon,) studied this question.
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