Thermochemically driven layer structure collapse via sulfate roasting toward the selective extraction of lithium and cobalt from spent LiCoO2 batteries
With the rapid development of new energy devices, a large amount of spent lithium-ion batteries (LIBs) are produced every year. Recovering valuable metals from spent LIBs is significant for achieving environmental protection and alleviating resource shortages. In this study, a novel approach by in s...
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Published in | Journal of power sources Vol. 572; p. 233094 |
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Main Authors | , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Elsevier B.V
15.07.2023
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Subjects | |
Online Access | Get full text |
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Summary: | With the rapid development of new energy devices, a large amount of spent lithium-ion batteries (LIBs) are produced every year. Recovering valuable metals from spent LIBs is significant for achieving environmental protection and alleviating resource shortages. In this study, a novel approach by in situ thermal reduction technology with waste copperas is developed to recycle valuable metals from spent LiCoO2 (LCO) batteries. The mechanism study through in situ x-ray diffractometer and thermal analysis reveal that the sulfation of LCO underwent two pathways i.e., ion exchange and gas-solid reactions. In the ion exchange pathway, the layered structure of LCO collapse due to the reduction by divalent iron in copperas, and the detachment of lithium ions result in a larger lattice spacing of transition metal layer and formation of a stable spinel structure. Furthermore, the SO2 generated from the decomposition of iron sulfates reduces the unreacted LCO through gas-solid interactions, realizing the sulfation of lithium and cobalt completely. Economic analysis indicates the potential benefit of this process is approximately 8266$/t spent LCO. This study provides an alternative technological route and a new approach to green recovery of the spent LCO batteries, exhibiting great potential for wide applications.
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•This study employed the concept of “waste to wealth”.•The conversion efficiency of Li and Co reached 100% after sulfation reaction.•An environmentally friendly approach for recycling spent LiCoO2 battery is proposed.•The mechanism of the sulfation reaction of LiCoO2 was obtained. |
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ISSN: | 0378-7753 1873-2755 |
DOI: | 10.1016/j.jpowsour.2023.233094 |