Green and Energy-Saving Recycling of LiCoO2by Synergetic Pyrolysis with Polyvinyl Chloride Plastics
|Corresponding Author||Huang，Haiyou; Shih，Kaimin; Tang，Yuanyuan|
Finding green and profitable recovery methods has always been a great challenge for Li/Co recovery from LiCoO2 (LCO) in waste lithium-ion batteries (LIBs). A top priority was specially proposed on energy and material consumptions for the industrialization of carbothermal technology from an economic point of view. Meanwhile, pollution caused by plastic wastes including polyvinyl chloride (PVC) plastics has already become a serious environmental issue. Therefore, in this study, we proposed a PVC-LCO synergetic pyrolysis strategy for Li/Co recovery. Results showed that the LiCoO2 was fully destructed to Li2CO3, CoO, Co, and Cl-containing salts at 450 °C for 90 min with a PVC/LCO mass ratio of 1:1. The reaction temperature was decreased significantly in comparison to the ever-reported values of the carbothermal technology. High-purity Li and Co were then separated simply by water leaching, with a recovery rate of 92.50 and 94.85%, respectively. Simultaneous thermogravimetric-mass analysis, thermodynamic analysis, and density functional theory revealed the reaction mechanisms as three-stage PVC cracking together with Li/Co-Cl bond formation after Cl adsorption on surface Li/Co of LCO. Overall, the PVC synergetic pyrolysis strategy possessed distinct advantages owing to the remarkable energy-conserving and chemical-free features and provided an economical, green, and scalable solution for LIB recycle.
First ; Corresponding
National Natural Science Foundation of China ; Natural Science Foundation of Guangdong Province["2021B1515020041","pdjh2020a0518"]
|WOS Research Area|
Chemistry ; Science & Technology - Other Topics ; Engineering
Chemistry, Multidisciplinary ; Green & Sustainable Science & Technology ; Engineering, Chemical
|WOS Accession No|
Cited Times [WOS]:0
|Document Type||Journal Article|
|Department||School of Environmental Science and Engineering|
1.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,1088 Xueyuan Blvd, Nanshan District,518055,China
2.Department of Civil Engineering,The University of Hong Kong,Hong Kong,Pokfulam Road,999077,Hong Kong
3.Institute for Advanced Materials and Technology,University of Science and Technology Beijing,Beijing,30 Xueyuan Road, Haidian District,100083,China
4.Faculty of Science and Technology,Technological and Higher Education Institute of Hong Kong,Hong Kong,999077,Hong Kong
|First Author Affilication||School of Environmental Science and Engineering|
|Corresponding Author Affilication||School of Environmental Science and Engineering|
|First Author's First Affilication||School of Environmental Science and Engineering|
Meng，Zhe,Huang，Weiwei,Gao，Lei,et al. Green and Energy-Saving Recycling of LiCoO2by Synergetic Pyrolysis with Polyvinyl Chloride Plastics[J]. ACS Sustainable Chemistry & Engineering,2022,10(37):12329-12341.
Meng，Zhe.,Huang，Weiwei.,Gao，Lei.,Dai，Jinchuan.,Lu，Xiaoying.,...&Tang，Yuanyuan.(2022).Green and Energy-Saving Recycling of LiCoO2by Synergetic Pyrolysis with Polyvinyl Chloride Plastics.ACS Sustainable Chemistry & Engineering,10(37),12329-12341.
Meng，Zhe,et al."Green and Energy-Saving Recycling of LiCoO2by Synergetic Pyrolysis with Polyvinyl Chloride Plastics".ACS Sustainable Chemistry & Engineering 10.37(2022):12329-12341.
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