Re-synthesis and Electrochemical Characteristics of LiFePO4 Cathode Materials Recycled from Scrap Electrodes

Title
Re-synthesis and Electrochemical Characteristics of LiFePO4 Cathode Materials Recycled from Scrap Electrodes
Authors
김형선신은정
Keywords
LiFePO4 cathode; Scrap electrode; Recycling process; Lithium-ion batteries
Issue Date
2013-03
Publisher
Bulletin of the Korean Chemical Society
Citation
VOL 34, NO 3, 851-855
Abstract
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.
URI
http://pubs.kist.re.kr/handle/201004/46172
ISSN
02532964
Appears in Collections:
KIST Publication > Article
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