Paper Title:
Ruthenium Oxide/Activated Carbon Composites for Electrochemical Capacitors
  Abstract

Activated carbon (AC) was prepared from lignite by microwave heating ZnCl2. The pore structure parameters of AC are characterized by nitrogen adsorption technique. The AC and ruthenium oxide/AC composite are characterized by thermogravimetric analysis and transmission electron microscope. Electrochemical properties of ACs and ruthenium oxide/AC composite electrodes were investigated by cyclic voltammetry and constant current charge–discharge after AC was pre−oxidized by HNO3 solution. The results show that the specific surface area and total pore volume of AC from lignite reaches 1310 m2 g−1 and 0.80 cm3 g−1, respectively. The micropore volume of AC from lignite totals only 12.5%. AC and ruthenium oxide/AC composite electrodes with 5wt.% ruthenium oxide loading show high cycle stability. Compared to pristine AC electrode, specific capacitance of ruthenium/AC composite electrode and energy density of ruthenium/AC capacitor after 100 charge−discharge cycles increases 40.8% and 39.1%, respectively.

  Info
Periodical
Advanced Materials Research (Volumes 347-353)
Chapter
Chapter 8: Energy Materials
Edited by
Weiguo Pan, Jianxing Ren and Yongguang Li
Pages
3370-3374
DOI
10.4028/www.scientific.net/AMR.347-353.3370
Citation
M. D. Zheng, R. C. Li, X. J. He, X. P. Dong, P. H. Ling, N. Zhao, X. Y. Zhang, M. X. Yu, M. B. Wu, "Ruthenium Oxide/Activated Carbon Composites for Electrochemical Capacitors", Advanced Materials Research, Vols. 347-353, pp. 3370-3374, 2012
Online since
October 2011
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Price
$32.00
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