Exfoliated graphite-ruthenium oxide composite electrodes for electrochemical supercapacitors

Mitra, Sagar ; Lokesh, K. S. ; Sampath, S. (2008) Exfoliated graphite-ruthenium oxide composite electrodes for electrochemical supercapacitors Journal of Power Sources, 185 (2). pp. 1544-1549. ISSN 0378-7753

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Official URL: http://linkinghub.elsevier.com/retrieve/pii/S03787...

Related URL: http://dx.doi.org/10.1016/j.jpowsour.2008.09.014

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:Article
Source:Copyright of this article belongs to Elsevier Science.
Keywords:Supercapacitor; Composite; Exfoliated Graphite; Ruthenium Oxide; Binderless Electrode
ID Code:57369
Deposited On:26 Aug 2011 08:07
Last Modified:26 Aug 2011 08:07

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