Ilmenite FeTiO3 nanoflowers and their pseudocapacitance
Tao, Tao, Glushenkov, Alexey M., Liu, Hongwei, Liu, Zongwen, Dai, Xiujuan J., Chen, Hua, Ringer, Simon P. and Chen, Ying 2011, Ilmenite FeTiO3 nanoflowers and their pseudocapacitance, Journal of physical chemistry C, vol. 115, no. 35, pp. 17297-17302.
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Ilmenite FeTiO3 nanoflowers and their pseudocapacitance
Pronounced and stable pseudocapacitance has been found in flowerlike FeTiO3 nanostructures that were synthesized from ball-milled ilmenite (natural mineral) under mild hydrothermal conditions. Each nanoflower is composed of many thin petals with a thickness of 5–20 nm and a width of 100–200 nm. The formation of these flowerlike nanostructures is attributed to a dissolution–precipitation mechanism involving an intermediate sodium-containing phase. Electrochemical properties of the obtained FeTiO3 nanostructures are evaluated in aqueous electrolytes. The capacitance of 122 ± 14.5 F/g is measured in 1 M KOH aqueous electrolyte at the current rate of 500 mA/g, and 50 ± 6 F/g is retained at 5 A/g. The material has good long-term cycling stability. According to our data, FeTiO3 nanostructures show functionality as an electrode material for supercapacitors.