Preparation of LiCoO2 films from spent lithium-ion batteries by a combined recycling process

Li Li, Renjie Chen*, Feng Sun, Feng Wu, Jianrui Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

213 Citations (Scopus)

Abstract

A new process is described for recovering and regenerating lithium cobalt oxide from spent lithium-ion batteries (LIBs) by a combination of dismantling, detachment with N-methylpyrrolidone (NMP), acid leaching and re-synthesis of LiCoO2 from the leach liquor as a cathode active material. The leach liquor, obtained from spent LIBs by using a nitric acid leaching solution, is used as electrolyte to regenerate LiCoO2 crystals on nickel plate at constant current in a single synthetic step using electrochemical deposition technology. The crystal structure and surface morphology of regenerated LiCoO2 were determined by X-ray diffraction (XRD) and scanning electron microscopy (SEM), respectively. LiCoO2 phase with preferred (104) orientation was electro-deposited on nickel substrate at current density 1 mA cm- 2 for 20 h, and found to have good characteristics as a cathode active material in terms of charge and discharge capacity, and cycling performance. The particle size and layer thickness of the regenerated LiCoO 2 crystalline powder were 0.5 μm and 0.2 mm, respectively. The initial charge and discharge capacity were 130.8 and 127.2 mAh g- 1, respectively. After 30 cycles, the capacity had decreased by less than 4% compared with the first cycle. This process involves simple equipment and could be feasible for recycling LIBs in large scale.

Original languageEnglish
Pages (from-to)220-225
Number of pages6
JournalHydrometallurgy
Volume108
Issue number3-4
DOIs
Publication statusPublished - Jul 2011

Keywords

  • Electrochemical-deposition
  • Lithium cobalt oxide
  • Regeneration
  • Spent lithium ion batteries

Fingerprint

Dive into the research topics of 'Preparation of LiCoO2 films from spent lithium-ion batteries by a combined recycling process'. Together they form a unique fingerprint.

Cite this