Fe2O3 nanomaterials synthesized by sol-gel method and their electrochemical properties

Authors: Bùi Thị Hằng*


In this study, Fe2O3 nanopowder was synthesized by sol-gel method from the raw materials Fe(NO3)3.9H2O and oxalic acid C2H2O4.2H2O to find the suitable materials applying for Fe-air battery anode. The structure, size and morphology of the obtained Fe2O3 materials were determined by X-ray diffraction and scanning electron microscopy. Electrochemical properties of Fe2O3 materials have been investigated via cyclic voltammetry measurement. The effect of carbon additive (AB) in Fe2O3/AB electrodes was also investigated to evaluate its applicability in Fe-air battery. The results showed that the fabricated Fe2O3 materials had clear redox peaks, especially Fe2O3/AB electrode provided high redox curent suggesting that its cyclability was better when AB was added in the electrode. The additive AB increased the electrical conductivity of the electrode and improved the cycability of the Fe2O3/AB electrode. Beside that, K2S additive in electrolyte facilitated the redox reaction rate of iron, reduced hydrogen evolution, leading to increased redox current, and thus improved the capacity and cycling efficiency of Fe2O3/AB electrodes.


Fe2O3 nanomaterials, Fe2O3/AB electrode, sol-gel method, Fe-air battery
Pages : 40-44

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