Use of glucose as reductant to recover Co from spent lithium ions batteries
Highlights: • Glucose was innovatively used as alternative to H{sub 2}O{sub 2} in leaching of spent LiCoO{sub 2} cathode material. • Over 98% Co and nearly 100% Li are leached with 1.5 mol/L phosphoric acid and 0.02 mol/L glucose at 80 °C in 2 h. • A molecular structure diagram was made to show dissolution process of reductive of Co(III) to Co(II) with glucose oxidation. • Cobalt oxalate (purity) was obtained as the precipitating product. • There are no reports on the leaching solution of glucose and phosphate acid. - Abstract: A hydrometallurgical leaching process has been developed for recovery of Co and Li from cathode material (LiCoO{sub 2}) collected from spent LIBs using a mix solution of glucose and phosphoric acid. The spent LiCoO{sub 2} before and after leaching process are analyzed by scanning electron microscopy. A leaching rate of about 98% Co and nearly 100% Li is presented with 1.5 mol/L phosphoric acid and 0.02 mol/L glucose at 80 °C in about 2 h. During leaching process, glucose was oxidized into monocarboxylic acid with reduction of Co(III) to Co(II). Co in solution was recovered as Co-oxalate after leaching process. Using glucose as reductant to dissolve LiCoO{sub 2} with chelating agent of phosphoric acid is achieved here.
- OSTI ID:
- 22742089
- Journal Information:
- Waste Management, Vol. 64; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0956-053X
- Country of Publication:
- United States
- Language:
- English
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