In situ chemical synthesis of ruthenium oxide/reduced graphene oxide nanocomposites for electrochemical capacitor applications

Ji Young Kim, Kwang Heon Kim, Seung Beom Yoon, Hyun Kyung Kim, Sang Hoon Park, Kwang Bum Kim

Research output: Contribution to journalArticle

49 Citations (Scopus)

Abstract

An in situ chemical synthesis approach has been developed to prepare ruthenium oxide/reduced graphene oxide (RGO) nanocomposites. It is found that as the C/O ratio increases, the number density of RuO2 nanoparticles decreases, because the chemical interaction between the Ru ions and the oxygen-containing functional groups provides anchoring sites where the nucleation of particles takes place. For electrochemical capacitor applications, the microwave-hydrothermal process was carried out to improve the conductivity of RGO in RuO2/RGO nanocomposites. The significant improvement in capacitance and high rate capability might result from the RuO2 nanoparticles used as spacers that make the interior layers of the reduced graphene oxide electrode available for electrolyte access.

Original languageEnglish
Pages (from-to)6804-6811
Number of pages8
JournalNanoscale
Volume5
Issue number15
DOIs
Publication statusPublished - 2013 Jul 11

All Science Journal Classification (ASJC) codes

  • Materials Science(all)

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