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ILMENITE (FeTiO3) AND ITS CAPACITIVE BEHAVIOUR S.Sankar, P.Abinaya, S.R.Srither and V. Rajendran* Centre for Nanoscience and Technology, K.S.Rangasamy College Of Technology, Thiruchengode, Namakkal (Dt) -637 215 ABSTRACT Iron titanium oxide (FeTiO3) nanoparticles were synthesised using co-precipitation method. The resulting product was further heated to 353 K (sample A) and 573 K (sample B). The samples were characterised using XRD, FTIR, XRF and SEM / EDAX. Electrochemical measurements of samples A and B were carried out by cyclic voltammograms and electrochemical impedance spectroscopy in 0.1 M Na2SO4 electrolyte. Cyclic voltammetry graphs were obtained for both samples A and B in a potential window between 0-0.5 V (vs.SCE) with a scan rate of 0.01, 0.025, 0.05 and 0.1 VS-1. The observed results reveal that sample B shows high capacitance value (42 Fg-1) than sample A (23 Fg-1). Moreover, the specific capacitance value of sample B is 40 % higher than iron oxide particles. Thus, the iron titanium oxide nanoparticles have a good specific capacitance value and it can applicable for all high power energy storage application. Particle Size Analysis INTRODUCTION  FeTiO3 is an antiferromagnetic semiconductor material, Wide band gap (2.54 eV) semiconductor  Due to magnetic , electronic and optical properties of FeTiO3 , it can be used in several applications. Applications  It is being widely used as high temperature integrated circuits and high power electronic devices batteries, fuel cells, supercapacitor & pseduocapacitor X-ray diffraction pattern of FeTiO

Sem Image

Sample A

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Sample B

Experimental Procedure

Cyclic Voltammograms (CV)

CRYSTAL STRUCTURE :ORTHORHOMBIC JCPDS REF. NO: 76-2372 AVERAGE CRYSTATTITE SIZE: 39 nm

Electrode Fabrication

Reference Electrode-saturated calomel electrode (SCE) Counter Electrode - Platinum foil The working electrode was prepared by mixing 70 wt% active material, 20 wt% Vulcan carbon (XC-72) as a conductive material and 10 wt% PVDF as a binder FeTiO3 under different scan rates from 0.01 to 0.1VS-1 between 0 to 5 V The specific capacitance of the sample A are calculated as 20.1, 21.1, 23.1 and 21.8 F/g at scan rate of 0.01, 0.025, 0.05 and 0.1V/S respectively Meanwhile the specific capacitances of sample B are calculated as 22.8, 30.6, 40 and 42.1 F/g with the scan rate of 0.01, 0.025, 0.05 and 0.1V/S CONCLUSION

Nanosheet iron titanium oxide (FeTiO3) can be effectively prepared by the co-precipitation method. The samples are obtained at different temperatures 353 k (sample A) and 553 k (sample B). The sample B shows high specific capacitance 42F/g compared to sample A which exists 23F/g. This study confirms that the sample B (553 k) is most promising material for supercapacitor application. CENTER FOR NANOSCIENCE & TECHNOLOGY K.S.RANGASAMY COLLEGE OF TECHNOLOGY


P14-07