期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 115, 期 35, 页码 17297-17302出版社
AMER CHEMICAL SOC
DOI: 10.1021/jp203345s
关键词
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资金
- Australian Research Council under the Centre of Excellence
- National Basic Research Program of China [2007CB6-13601]
- China Scholarship Council (CSC)
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.
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