Re-synthesis and Electrochemical Characteristics of LiFePO4 Cathode Materials Recycled from Scrap Electrodes
- Re-synthesis and Electrochemical Characteristics of LiFePO4 Cathode Materials Recycled from Scrap Electrodes
- 김형선; 신은정
- LiFePO4 cathode; Scrap electrode; Recycling process; Lithium-ion batteries
- Issue Date
- Bulletin of the Korean Chemical Society
- VOL 34, NO 3, 851-855
- 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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