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Ilmenite FeTiO3 nanoflowers and their pseudocapacitance

journal contribution
posted on 29.07.2011, 00:00 authored by Tao Tao, Alexey Glushenkov, H Liu, Z Liu, Xiujuan Dai, Hua Chen, S Ringer, Ying (Ian) ChenYing (Ian) Chen
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.

History

Journal

Journal of physical chemistry C

Volume

115

Issue

35

Pagination

17297 - 17302

Publisher

American Chemical Society

Location

Washington, D. C.

ISSN

1932-7447

eISSN

1932-7455

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2011, American Chemical Society.