Asymmetric metal oxide pseudocapacitors advanced by three-dimensional nanoporous metal electrodes

L. Y. Chen, Y. Hou, J. L. Kang, A. Hirata, M. W. Chen

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51 Citations (Scopus)

Abstract

We report a novel RuO2-NPG//Co(OH)2-NPG asymmetric supercapacitor with a high specific capacitance and a wide potential window in which bifunctional nanoporous gold is used as both the highly conductive supports of the pseudocapacitive oxides and the 3D current collectors in the device. The RuO2-NPG and Co(OH)2-NPG electrodes can reach specific capacitances of 1300 F g-1 and 1800 F g-1, respectively, which provide comparatively high specific capacitances in relation to metal oxide/carbon electrodes, giving rise to an asymmetric oxide pseudocapacitor with a large capacitance of ∼350 F g-1, high working voltage of 1.6 V and an ultrahigh energy density of ∼120 W h kg -1.

Original languageEnglish
Pages (from-to)8448-8455
Number of pages8
JournalJournal of Materials Chemistry A
Volume2
Issue number22
DOIs
Publication statusPublished - 2014 Jun 14

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ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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