Preparation of Fe2O3-exfoliated graphite composite and its electrochemical properties investigated in alkaline solution |
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| Authors: | Jan Urbaniak Jan M. Skowroński Barbara Olejnik |
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| Affiliation: | (1) Institute of Chemistry and Technical Electrochemistry, Poznan University of Technology, ul. Piotrowo 3, 60-965 Poznan, Poland;(2) Institute of Non-Ferrous Metals, Branch in Poznan, Central Laboratory of Batteries and Cells, Forteczna 12, 61-362 Poznan, Poland; |
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| Abstract: | In the present work, a simple method of preparation of FeCl4−- graphite intercalation compounds from HCl/FeCl3 solution with the aid of chemical oxidant is presented. Based on X-ray diffraction measurements it was concluded, that stages 8, 6, and 5 FeCl4−-graphite intercalation compounds were obtained. The compounds thus obtained were thermally treated to obtain Fe2O3-exfoliated graphite composites. The dispersion of Fe2O3 in the exfoliated graphite flakes was examined with the aid of the energy dispersive X-ray analysis combined with a scanning electron microscopy. Electrochemical behavior of electrodes was investigated in 6 M KOH solution. Electrochemical investigations proved the formation of FeOOH on the surface of exfoliated graphite during the anodic process. Besides, electrochemical investigations showed that the lower limit potential strongly affects the redox behavior of the Fe2O3-EG electrode. |
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