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Exfoliated graphite–ruthenium oxide composite electrodes for electrochemical supercapacitors

Mitra, Sagar and Lokesh, KS and Sampath, S (2008) Exfoliated graphite–ruthenium oxide composite electrodes for electrochemical supercapacitors. In: Journal of Power Sources, 185 (2). pp. 1544-1549.

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Abstract

The performance of exfoliated graphite (EG)–ruthenium oxide (RuOx) composites as binderless electrodes is evaluated for electrochemical capacitors (ECs). A composite of EG–RuOx is prepared by a modified sol–gel process. The material is characterized using X-ray diffraction and microscopy. Electrochemical capacitors with the composite electrodes in the presence of aqueous sulfuric acid (H2SO4) electrolyte are evaluated using voltammetry, impedance and charge–discharge studies. Cyclic voltammetry reveals very stable current–voltage behaviour up to several thousands of cycles, as well as high specific capacitances, e.g., a few hundreds of farads per gram for the composite that contains 16.5 wt.% RuOx.

Item Type: Journal Article
Additional Information: Copyright of this article belongs to Elsevier Science.
Keywords: Supercapacitor;Composite;Exfoliated graphite;Ruthenium oxide;Binderless electrode.
Department/Centre: Division of Chemical Sciences > Inorganic & Physical Chemistry
Date Deposited: 29 Mar 2010 10:34
Last Modified: 19 Sep 2010 05:57
URI: http://eprints.iisc.ernet.in/id/eprint/26376

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