Abstract

A hydrous ruthenic acid possessing a layered structure with a crystalline framework was prepared by proton exchange of a layered potassium ruthenate. Its electrochemical capacitor behavior was studied by cyclic voltammetry in various electrolytes. Specific capacitance up to 390 F at a scan rate of 50 mV s−1, which is a ten-fold increase compared to conventional anhydrous was obtained using layered ruthenic acid hydrate in 0.5 M electrolyte. Slightly lower values were obtained for 1 M and 1 M KOH electrolytes. The difference in the specific capacitance of anhydrous ruthenium oxide, hydrous ruthenium oxide, hydrous ruthenic acid, and restacked ruthenic acid nanosheets in the various electrolytes is discussed. © 2004 The Electrochemical Society. All rights reserved.

Keywords

Ruthenium oxideAnhydrousElectrolyteElectrochemistryCyclic voltammetryHydrateInorganic chemistryRutheniumOxideChemistryCapacitanceMaterials scienceElectrodeCatalysisPhysical chemistryOrganic chemistry

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Publication Info

Year
2004
Type
article
Volume
151
Issue
8
Pages
A1181-A1181
Citations
91
Access
Closed

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Wataru Sugimoto, Hideki Iwata, Yasushi Murakami et al. (2004). Electrochemical Capacitor Behavior of Layered Ruthenic Acid Hydrate. Journal of The Electrochemical Society , 151 (8) , A1181-A1181. https://doi.org/10.1149/1.1765681

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DOI
10.1149/1.1765681