Study on the reduction roasting of spent LiNixCoyMnzO2 lithium-ion battery cathode materials

Simple and environment-friendly recovery of valuable metals from spent LIBs was explored. The experimental method, which included reduction roasting and hydrometallurgical recovery, is called a quasi-reversible process. The principle behind the quasi-reversible model could be used to assess the ener...

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Bibliographic Details
Published in:Journal of thermal analysis and calorimetry 2019-05, Vol.136 (3), p.1323-1332
Main Authors: Liu, Pengcheng, Xiao, Li, Tang, Yiwei, Chen, Yifeng, Ye, Longgang, Zhu, Yirong
Format: Article
Language:English
Subjects:
Acid leaching
Analytical Chemistry
Cathodes
Chemistry
Chemistry and Materials Science
Coke
Crystallization
Dosage
Electrode materials
Energy recovery
Inorganic Chemistry
Leaching
Lithium
Lithium-ion batteries
Manganese
Materials recovery
Measurement Science and Instrumentation
Nickel
Physical Chemistry
Polymer Sciences
Rechargeable batteries
Reduction
Roasting
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Summary:Simple and environment-friendly recovery of valuable metals from spent LIBs was explored. The experimental method, which included reduction roasting and hydrometallurgical recovery, is called a quasi-reversible process. The principle behind the quasi-reversible model could be used to assess the energy consumed during the recovery of metals from cathode active materials. The roasting process was analysed using TG–DSC and Kissinger equation. XRD patterns and mass loss ratios were used to investigate the layered LiNi x Co y Mn z O 2 that broke into Li 2 CO 3 , MnO, NiO, Ni and Co. Roasting temperature, coke dosage and roasting time were assessed to determine the leaching efficiency of Li, Ni, Co and Mn. Results indicated that the optimum roasting conditions were roasting temperature of 650 °C, coke dosage of 10% and roasting time of 30 min. The roasted products under the optimum parameters were used to leach the valuable metals, and the leaching efficiencies of Li, Ni, Co and Mn were 93.67%, 93.33%, 98.08% and 98.68%, respectively. Li 2 CO 3 solution recovered from water leaching could be utilised to produce Li 2 CO 3 by evaporative crystallisation. Moreover, divalent solution of Ni, Co and Mn obtained via acid leaching without added reducer could be recycled in the co-precipitation of the ternary precursor.
ISSN:1388-6150
1588-2926
DOI:10.1007/s10973-018-7732-7