image: The recycling of LCO is realized in a closed-loop protocol, where the dissolution/extraction of the cobalt element involves no additional precipitates, thus enabling the reusability of the leaching solution. view more
Credit: Journal of Energy Chemistry
Taibai Li, Xiang Ge, and their colleagues from School of Materials and Metallurgy, Guizhou University have reported the efficient closed-loop recycling of the cathode material lithium cobalt oxide (LCO) of LIBs employing ChCl:OA type DES of low barrier. The ultrafast leaching process can be achieved in 10 s at 180 ℃, and a nearly 100% leaching rate can be achieved in 2 h at 90 ℃, which meets the requirements of mild and efficient reaction process design. Furthermore, DIW is added or evaporated into the leaching solution to achieve direct precipitation of cobalt ions and reversible recovery of the leaching solvent. The cobalt ions may be precipitated as cobalt oxalate phase, annealed, and calcined into LCO material with good crystallinity, and its electrochemical performance is comparable with the commercialized sample. The work was published as a manuscript entitled “Closed-loop cobalt recycling from spent lithium-ion batteries based on a deep eutectic solvent (DES) with easy solvent recovery” in the Journal of Energy Chemistry.
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The Journal of Energy Chemistry is a publication that mainly reports on creative researches and innovativeapplications of chemical conversions of fossil energy, carbon dioxide, electrochemical energy and hydrogen energy,as well as the conversions of biomass and solar energy related with chemical issues to promote academicexchanges in the field of energy chemistry and to accelerate the exploration, research and development of energyscience and technologies.
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