Synthesis and Characterization of Sb-Doped SnO2 Xerogel Electrochemical Capacitor

N. L. Wu, J. Y. Hwang, P. Y. Liu, C. Y. Han, S. L. Kuo, K. H. Liao, M. H. Lee, S. Y. Wang

Research output: Contribution to journalArticle

26 Citations (Scopus)

Abstract

The performance of electrochemical capacitors made of Sb (6 mol %)-doped SnO2 xerogel electrodes and nonacidic aqueous electrolyte solutions, including 0.1-2 M KOH and Na2SO4, has been studied as a function of the thermal history of the xerogel. With increasing calcination temperature, the capacitance per unit weight was found first to increase, due to improved crystallinity, and then to decrease after 500°C due to surface loss. The fully crystallized xerogel exhibited capacitance behaviors consistent with the space-charge model of a semiconductor, showing an average capacitance per unit real surface area of 8 and 16 μF/cm2 within ±1.0 V for calcination in air and in vacuum (0.1 Torr), respectively. Composite electrode using the xerogel as a substrate for highly dispersed RuO2 particles has been constructed, showing a capacitance of 670 F/g RuO2 with a base (1 M KOH) electrolyte solution.

Original languageEnglish
Pages (from-to)A550-A553
JournalJournal of the Electrochemical Society
Volume148
Issue number6
DOIs
Publication statusPublished - 2001 Jun 1

Fingerprint

Xerogels
xerogels
electrochemical capacitors
Capacitors
Capacitance
capacitance
synthesis
Calcination
roasting
Electrolytes
electrolytes
Electrodes
electrodes
Electric space charge
space charge
crystallinity
histories
Vacuum
Semiconductor materials
vacuum

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

Cite this

Wu, N. L., Hwang, J. Y., Liu, P. Y., Han, C. Y., Kuo, S. L., Liao, K. H., ... Wang, S. Y. (2001). Synthesis and Characterization of Sb-Doped SnO2 Xerogel Electrochemical Capacitor. Journal of the Electrochemical Society, 148(6), A550-A553. https://doi.org/10.1149/1.1368099

Synthesis and Characterization of Sb-Doped SnO2 Xerogel Electrochemical Capacitor. / Wu, N. L.; Hwang, J. Y.; Liu, P. Y.; Han, C. Y.; Kuo, S. L.; Liao, K. H.; Lee, M. H.; Wang, S. Y.

In: Journal of the Electrochemical Society, Vol. 148, No. 6, 01.06.2001, p. A550-A553.

Research output: Contribution to journalArticle

Wu, NL, Hwang, JY, Liu, PY, Han, CY, Kuo, SL, Liao, KH, Lee, MH & Wang, SY 2001, 'Synthesis and Characterization of Sb-Doped SnO2 Xerogel Electrochemical Capacitor', Journal of the Electrochemical Society, vol. 148, no. 6, pp. A550-A553. https://doi.org/10.1149/1.1368099
Wu, N. L. ; Hwang, J. Y. ; Liu, P. Y. ; Han, C. Y. ; Kuo, S. L. ; Liao, K. H. ; Lee, M. H. ; Wang, S. Y. / Synthesis and Characterization of Sb-Doped SnO2 Xerogel Electrochemical Capacitor. In: Journal of the Electrochemical Society. 2001 ; Vol. 148, No. 6. pp. A550-A553.
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