Facile preparation of three-dimensional porous hydrous ruthenium oxide electrode for supercapacitors

Myung Gi Jeong, Kai Zhuo, Serhiy Cherevko, Woo Jae Kim, Chan Hwa Chung

Research output: Contribution to journalArticlepeer-review

54 Scopus citations

Abstract

A porous hydrous ruthenium oxide for supercapacitors is fabricated by electro-deposition accompanied with hydrogen-evolution reaction. This high-surface-area electrode (207.5 m2 g-1) is developed by electrochemical de-alloying process of copper from as-deposited Ru-(Cu) foam (23.5 m2 g-1). The threedimensional structures with open pores and numerous dendritic morphologies produce good electrochemical performances by providing the pathway for facile penetration of electrolytes into active electrode surface. The three-dimensional porous hydrous ruthenium oxide exhibits good capacitance performance of 809 F g-1 at 1.5 A g-1, high energy density (112 Wh kg-1), and excellent stability retention (∼98%) even after 3000 cycles.

Original languageEnglish
Pages (from-to)806-811
Number of pages6
JournalJournal of Power Sources
Volume244
DOIs
StatePublished - 2013

Keywords

  • Dendrite structure
  • Electrochemical dealloying
  • Hydrogen evolution reaction
  • Porous hydrous ruthenium oxide
  • Pseudo-capacitor

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