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Bulletin of the Korean Chemical Society (BKCS)

ISSN 0253-2964(Print)
ISSN 1229-5949(Online)
Volume 34, Number 3
BKCSDE 34(3)
March 20, 2013 

Re-synthesis and Electrochemical Characteristics of LiFePO4 Cathode Materials Recycled from Scrap Electrodes
Hyung Sun Kim*, Eun Jung Shin
LiFePO4 cathode, Scrap electrode, Recycling process, Lithium-ion batteries
This paper describes an environmentally friendly process for the recovery of LiFePO4 cathode materials from scrap electrodes by a simple thermal treatment method. The active materials were easily separated from the aluminum substrate foil and polymeric binders were also decomposed at different temperatures (400 oC, 500 oC, 600 oC) for 30 min under nitrogen gas flow. The samples were characterized by X-ray diffraction (XRD), scanning electronic microscopy (SEM), Raman spectroscopy, Thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). The electrochemical properties of the recycled LiFePO4 cathode were evaluated by galvanostatic charge and discharge modes. The specific charge/discharge capacities of the recycled LiFePO4 cathode were similar to those of the original LiFePO4 cathode. The LiFePO4 cathode material recovered at 500 oC exhibits a somewhat higher capacity than those of other recovered materials at high current rates. The recycled LiFePO4 cathode also showed a good cycling performance.
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