Ilmenite FeTiO3 Nanoflowers and Their Pseudocapacitance

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• 作者：Tao Tao ; Alexey M. Glushenkov ; Hongwei Liu ; Zongwen Liu ; Xiujuan J. Dai ; Hua Chen ; Simon P. Ringer ; Ying Chen
• 刊名：Journal of Physical Chemistry C
• 出版年：2011
• 出版时间：September 8, 2011
• 年：2011
• 卷：115
• 期：35
• 页码：17297-17302
• 全文大小：906K
• 年卷期：v.115,no.35(September 8, 2011)
• ISSN：1932-7455

文摘

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鈥?0 nm and a width of 100鈥?00 nm. The formation of these flowerlike nanostructures is attributed to a dissolution鈥損recipitation mechanism involving an intermediate sodium-containing phase. Electrochemical properties of the obtained FeTiO₃ nanostructures are evaluated in aqueous electrolytes. The capacitance of 122 卤 14.5 F/g is measured in 1 M KOH aqueous electrolyte at the current rate of 500 mA/g, and 50 卤 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.