Facile synthesis of single crystalline mesoporous hematite nanorods with enhanced supercapacitive performance

Xingyan Xu, Chuanbao Cao*, Youqi Zhu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)

Abstract

α-Fe2O3 nanorods with a length of 400-700 nm and a diameter of 20-80 nm, which have single-crystalline and mesoporous structure, could be obtained from these α-FeOOH precursors after calcining at 300 °C in air. The as-prepared single-crystalline mesoporous α-Fe2O3 nanorodes exhibited a large specific surface area and porosity, effectively increasing the contact area between the electrode materials and electrolyte, minimizing both the ionic and electronic transportation in the Fe2O3 during the charge-discharge process. The porous nanostructure facilitates the faster faradic reaction toward electrolytes and delivers highest specific capacitance (534 F g-1) and an excellent long cycle life (upto 1500 cycles) in 1 M KOH electrolyte at current density of 4 A g-1, demonstrating that the porous α-Fe2O3 nanorods can serve as an excellent electrode material for supercapacitors. It is believed that the single-crystalline mesoporous α-Fe2O3 nanorods are beneficial to the charge transfer in the electrode and to the ion transport in the solution during redox reaction.

Original languageEnglish
Pages (from-to)257-262
Number of pages6
JournalElectrochimica Acta
Volume155
DOIs
Publication statusPublished - 10 Feb 2015

Keywords

  • Electrochemical properties
  • Hematite
  • Supercapacitor

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