Hybrid electrochemical capacitor of IrO2 nanocrystal and hydrous RuO2

Diah Susanti*, Dah Shyang Tsai, Ying Sheng Huang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


Hybrid electrochemical capacitors of anhydrous IrO2 nanocrystal and hydrous RuO2 have been prepared via metal organic chemical vapor deposition (MOCVD) and electrochemical deposition. The structures were studied using scanning electron microscope (SEM), high resolution transmission electron microscope (HRTEM) and X-Ray Diffraction (XRD). The electrochemical properties were measured by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). In a miniaturized configuration, the CVD grown structure provides a connecting backbone of electron paths and open channels for ion migration to facilitate the charge delivery or acceptance from the electrodeposited hydrous RuO2 of high pseudocapacitance. The sample of thermally reduced nanocrystals encased in RuO2·0.46H2O exhibits a total capacitance of ~484.75 Fg-1 at 10 mVs-1, higher than that of the RuO2 0.46H2O coated as-grown nanocrystals of ~352 Fg-1.

Original languageEnglish
Pages (from-to)552-559
Number of pages8
JournalScience of Advanced Materials
Issue number4
Publication statusPublished - Dec 2010


  • Anhydrous IrO
  • Capacitance
  • Hydrous RuO
  • Nanocrystal
  • Thermal reduction


Dive into the research topics of 'Hybrid electrochemical capacitor of IrO2 nanocrystal and hydrous RuO2'. Together they form a unique fingerprint.

Cite this