Hydrothermal synthesis and electrochemical properties of FeNbO4 nanospheres

Hyun Woo Shim, In Sun Cho, Hong Kug Sun, Ah Hyeon Lim, Dong Wan Kim

Research output: Contribution to journalArticle

10 Citations (Scopus)

Abstract

Iron niobate (FeNbO4) nanospheres of an orthorhombic structure were synthesized using a hydrothermal (HT) process at 250°C, and were characterized using X-ray diffraction, field-emission scanning electron microscopy, high-resolution transmission electron microscopy, and BrunauerEmmettTeller (BET) measurements. The FeNbO4 nanospheres obtained through the HT reaction revealed a uniform size with an average diameter of 510 nm, and a larger specific surface area (82.72m2 g-1) than that of bulk FeNbO4 powder (2.51m2 g-1) prepared by a solid-state reaction. In addition, the electrochemical properties of the FeNbO4 powders versus Li were evaluated using cyclic voltammetry and galvanostatic charge/discharge cycling. Importantly, the FeNbO4 nanospheres delivered a reversible capacity of over 200mAh g-1 after 20 cycles, and provided an enhanced rate capability compared to the bulk material.

Original languageEnglish
Pages (from-to)82-85
Number of pages4
JournalJournal of the Ceramic Society of Japan
Volume120
Issue number1398
DOIs
Publication statusPublished - 2012 Feb
Externally publishedYes

Keywords

  • Crystal structure
  • Hydrothermal synthesis
  • Iron niobate
  • Lithium-ion battery
  • Nanosphere

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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