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| Type |
Oral Presentation |
| Area |
Oral Presentation of Young Analytical Chemists I |
| Room No. |
Room C311+C312 |
| Time |
THU 10:21-: |
| Code |
ANAL1.O-31 |
| Subject |
Synthesis and Characterization of Graphene-enfolded TiO2 Anatase as Anode Materials for Li-Secondary Batteries |
| Authors |
Hasan Jamal
Department of Chemistry, Keimyung University, Korea |
| Abstract |
In this study, graphene-bonded and enfolded anatase TiO2 of various types composites have been synthesized without using any cross-linking reagent, by using graphene oxide (GO) and titanium dioxide as a precursor. In which graphene sheets are uniformly dispersed among the TiO2 anatase particles, in order to enhance the cyclic ability and electronic conductivity of TiO2 anode for lithium ion batteries. The composites of GO with three types of anatase TiO2 (Nanoparticles, Nanorods, Nanofibers) were synthesized by hydrothermal and calcination treatment. The reduction of GO was simultaneously proceeded after the calcination in an argon atmosphere at 400 °C for 4 h. The physicochemical properties were characterized by Scanning electron microscopy (SEM), Transmission electron microscopy (TEM), X-ray powder diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. Surface properties were measured by BET & BJH method. The electrochemical properties were also investigated by cyclic voltammetry (CV) and Electrochemical Impedance Spectra (EIS). The TiO2 nanorods/graphene composite having unique morphology showed superior discharge capacity of 135 mAh g-1 at a current density of 0.5 C than other types of TiO2 composites and achieved a reversible capacity of 105 mAh g-1 after 35 cycles. |
| E-mail |
hasanjamal13@yahoo.com |
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120th General Meeting of the KCS