Synthesis and characterization of MnO2-based mixed oxides as supercapacitors

Hansung Kim, Branko N. Popov

Research output: Contribution to journalArticle

255 Citations (Scopus)

Abstract

Mn/Pb and Mn/Ni mixed oxide were prepared at ambient temperature by reduction of KMnO4 with Mn, Pb, and Ni salts. This low-temperature approach provides amorphous structure of the active material. The specific capacitance of pure MnO2 was estimated to be 166 F/g and increased to 210 and 185 F/g for Mn/Ni and Mn/Pb oxides, respectively. The carbon loading was optimized at 20 wt %. Based on a single electrode, the Mn/Ni mixed oxide showed a high rate capability of 3.12 Wh/kg at constant power discharge of 1 kW/kg.

Original languageEnglish
Pages (from-to)D56-D62
JournalJournal of the Electrochemical Society
Volume150
Issue number3
DOIs
Publication statusPublished - 2003 Mar

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Renewable Energy, Sustainability and the Environment
  • Surfaces, Coatings and Films
  • Electrochemistry
  • Materials Chemistry

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