Antisolvent crystallization from deep eutectic solvent leachates of LiNi1/3Mn1/3Co1/3O2 for recycling and direct synthesis of battery cathodes

Upcycling of lithium cobalt oxide to LiNi1/3Mn1/3Co1/3O2

“…It is important to note that in the case of actual recycled LCO cathodes, the components such as Al and Cu, originating from current collectors, inevitably affect the leaching process, resulting in a solution containing Cu and Al. 22,26 Previous studies 45 have demonstrated that the presence of Cu and Al (6.4 mol% metal base) in the organic acid-based NMC precursor leads to a notable decrease in discharge capacity. Therefore, it is essential to remove impurities before leaching, reduce impurity levels by controlling the antisolvent crystallization process, or further purify the precipitates from the antisolvent step to decrease the impurity content.…”