The application of catalyst-recovered SnO2 as an anode material for lithium secondary batteries
2016
Ryu, Da-Jeong | Jung, Hee-Won | Lee, Sung Hun | Park, Da-Jeong | Ryu, Kwang-Sun
We studied the electrochemical characteristics of tin dioxide (SnO₂) recovered from waste catalyst material which had been previously used in a polymer synthesis reaction. In order to improve the electrochemical performance of the SnO₂ anode electrode, we synthesized a nanocomposite of recovered SnO₂ and commercial iron oxide (Fe₂O₃) (weight ratio 95:5) using a solid state method. X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM) analyses revealed an additional iron oxide phase within a porous nanocomposite architecture. The electrochemical characterizations were based on galvanostatic charge–discharge (CD) curves, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS). In the first discharge, the capacity of the SnO₂–Fe₂O₃ nanocomposite was 1700 mAh g⁻¹, but was reduced to about 1200 mAh g⁻¹ in the second discharge. Thereafter, a discharge capacity of about 1000 mAh g⁻¹was maintained up to the 20th cycle. The SnO₂–Fe₂O₃ nanocomposite showed better reversible capacities and rate capabilities than either the recovered SnO₂ or commercial Fe₂O₃ nanoparticle samples.
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