Carbon-supported, nano-structured, manganese oxide composite electrode for electrochemical supercapacitor

Raj Kishore Sharma, Hyung Suk Oh, Yong Gun Shul, Hansung Kim

Research output: Contribution to journalArticlepeer-review

117 Citations (Scopus)


Carbon-supported MnO2 nanorods are synthesized using a microemulsion process and a manganese oxide/carbon (MnO2/C) composite is investigated for use in a supercapacitor. As shown by high-resolution transmission electron microscopy the 2 nm × 10 nm MnO2 nanorods are uniformly dispersed on the carbon surface. Cyclic voltammograms recorded for the MnO2/C composite electrode display ideal capacitive behaviour between -0.1 and 0.8 V (vs. saturated calomel electrode) with high reversibility. The specific capacitance of the MnO2/C composite electrode found to be 165 F g-1 and is estimated to be as high as 458 F g-1 for the MnO2. Based on cyclic voltammetric life-cycle tests, the MnO2/C composite electrode gives a highly stable and reversible performance for up to 10,000 cycles.

Original languageEnglish
Pages (from-to)1024-1028
Number of pages5
JournalJournal of Power Sources
Issue number2 SPEC. ISS.
Publication statusPublished - 2007 Nov 15

All Science Journal Classification (ASJC) codes

  • Renewable Energy, Sustainability and the Environment
  • Energy Engineering and Power Technology
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering


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