A facile and template-free hydrothermal synthesis of Mn 3O 4 nanorods on graphene sheets for supercapacitor electrodes with long cycle stability

Jeong Woo Lee, Anthony S. Hall, Jong Duk Kim, Thomas E. Mallouk

Research output: Contribution to journalArticle

586 Scopus citations

Abstract

Graphene/Mn 3O 4 composites were prepared by a simple hydrothermal process from KMnO 4 using ethylene glycol as a reducing agent. Mn 3O 4 nanorods of 100 nm to 1 μm length were observed to be well-dispersed on graphene sheets. To assess the properties of these materials for use in supercapacitors, cyclic voltammetry and galvanostatic charging-discharging measurements were performed. Graphene/Mn 3O 4 composites could be charged and discharged faster and had higher capacitance than free Mn 3O 4 nanorods. The capacitance of the composites was 100% retained after 10 000 cycles at a charging rate of 5 A/g.

Original languageEnglish (US)
Pages (from-to)1158-1164
Number of pages7
JournalChemistry of Materials
Volume24
Issue number6
DOIs
StatePublished - Mar 27 2012

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Chemistry

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