Recovery of cobalt as cobalt oxalate from spent lithium ion batteries by using glycine as leaching agent

Abstract In the article, we are explaining a hydrometallurgical based process on leaching applied to recover Co from spent lithium ion batteries (LIBs). Glycine and ascorbic acid were introduced as leaching reagents and the leaching of Co with a solution containing glycine is investigated. An effective recovery of Co is possible when both glycine and ascorbic acid are used. A condition for achieving a recovery of more than 95% Co has been achieved experimentally by varying the concentrations of leachant and time of the reaction. Leaching with 0.5 M glycine, 0.02 M ascorbic acid and 0.2 g LiCoO 2 in a batch extractor, results in a highly efficient recovery of Co within 360 min of the processing time at 80 °C. This hydrometallurgical process is found to be simple, eco friendly and satisfactory for the recovery of cobalt from spent LIBs.

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