Green and Energy-Saving Recycling of LiCoO2by Synergetic Pyrolysis with Polyvinyl Chloride Plastics

Meng，Zhe1,2; Huang，Weiwei3; Gao，Lei3; Dai，Jinchuan1; Lu，Xiaoying4; Liu，Jiadong1; Huang，Haiyou3; Shih，Kaimin2; Tang，Yuanyuan1

2022-09-19

10.1021/acssuschemeng.2c03616

ACS Sustainable Chemistry & Engineering   Impact Factor & Quartile

2168-0485

2168-0485

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.

LiCoO2 lithium-ion batteries polyvinyl chloride recovery synergetic pyrolysis

SCI

English

First ; Corresponding

National Natural Science Foundation of China[41977329] ; Natural Science Foundation of Guangdong Province["2021B1515020041","pdjh2020a0518"]

Chemistry ; Science & Technology - Other Topics ; Engineering

Chemistry, Multidisciplinary ; Green & Sustainable Science & Technology ; Engineering, Chemical

WOS:000863203500001

AMER CHEMICAL SOC

2-s2.0-85138031654

Scopus

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

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.