Preparation and characterization of electro-spun RuO2-Ag 2O composite nanowires for electrochemical capacitors

Jung Bae Lee, Sang Yong Jeong, Won Jin Moon, Tae Yeon Seong, Hyo Jin Ahn

Research output: Contribution to journalArticle

30 Citations (Scopus)

Abstract

We synthesized RuO2-Ag2O composite nanowires by means of an electrospinning method and investigated the capacitance, high-rate performance, and cycle number dependence of the composite nanowire electrodes. In order to synthesize optimum RuO2-Ag2O composite nanowires, the relative mole ratio of Ag precursor to Ru precursor varied from ∼0.1 to ∼0.3. X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and high-resolution transmission electron microscopy results show that crystalline RuO2-Ag2O composite nanowires (∼40-70 nm in diameter) are formed upon calcinations. Cyclic voltammetry results show that among the samples, the RuO 2-Ag2O composite nanowires fabricated with the mole ratio of ∼0.2 give the highest capacitance, excellent high-rate performance, and excellent retention of capacity (∼97%).

Original languageEnglish
Pages (from-to)4336-4340
Number of pages5
JournalJournal of Alloys and Compounds
Volume509
Issue number11
DOIs
Publication statusPublished - 2011 Mar 17

Keywords

  • Capacitance
  • Electrochemcial capacitors
  • High-rate performance
  • Nanowires

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

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