Journal
JOURNAL OF SOLID STATE ELECTROCHEMISTRY
Volume 18, Issue 4, Pages 1057-1066Publisher
SPRINGER
DOI: 10.1007/s10008-013-2355-1
Keywords
Iron oxides; Porous nanostructures; Supercapacitors
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Funding
- University Grant Commission (UGC), Government of India [F.4-2/2006(BSR)/13-626/2012(BSR)]
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Porous alpha-Fe2O3 nanostructures have been synthesized by sol-gel route. The effect of preparation temperature on the morphology, structure, and electrochemical stability upon cycling has been studied for supercapacitor application. The discharge capacitance of alpha-Fe2O3 prepared at 300 A degrees C is 193 F g(-1), when the electrodes are cycled in 0.5 M Na2SO3 at a specific current of 1 A g(-1). The capacitance retention after 1,000 cycles is about 92 % of the initial capacitance at a current density of 2 A g(-1). The high discharge capacitance as well as stability of alpha-Fe2O3 electrodes is attributed to large surface area and porosity of the material. There is a decrease in specific capacitance (SC) on increasing the preparation temperature. As iron oxides are inexpensive, the synthetic route adopted for alpha-Fe2O3 in the present study is convenient and the SC is high with good cycling stability, the porous alpha-Fe2O3 is a potential material for supercapacitors.
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