Preparation and characterization of electro-spun RuO sub(2-Ag) sub(2)O composite nanowires for electrochemical capacitors

• Published in: Journal of alloys and compounds Vol. 509; no. 11; pp. 4336 - 4340
• Main Authors: Lee, Jung-Bae, Jeong, Sang-Yong, Moon, Won-Jin, Seong, Tae-Yeon, Ahn, Hyo-Jin
• Format: Journal Article
• Language: English
• Published: 17-03-2011
• Subjects: Capacitance; Diffraction; Electrodes; Moles; Nanowires; Precursors; Scanning electron microscopy; X-rays
• ISSN: 0925-8388
• DOI: 10.1016/j.jallcom.2011.01.063

We synthesized RuO sub(2-Ag) sub(2)O 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 RuO sub(2-Ag) sub(2)O composite nanowires, the relative mole ratio of Ag precursor to Ru precursor varied from [inline image]0.1 to [inline image]0.3. X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, and high-resolution transmission electron microscopy results show that crystalline RuO sub(2-Ag) sub(2)O composite nanowires (40-70 nm in diameter) are formed upon calcinations. Cyclic voltammetry results show that among the samples, the RuO sub(2-Ag) sub(2)O composite nanowires fabricated with the mole ratio of [inline image]0.2 give the highest capacitance, excellent high-rate performance, and excellent retention of capacity (97%).