Nanostructured Co3O4/nitrogen doped carbon nanotube composites for high-performance supercapacitors

Sivalingam Ramesh, Yuvaraj Haldorai, Arumugam Sivasamy, Heung Soo Kim

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

In this study, a nanostructured cobalt oxide/nitrogen doped multiwall carbon nanotube (N-MWCNT/Co3O4) composite was synthesized by thermal decomposition process in the presence of aqueous ammonia and urea. Transmission electron microscopy (TEM) confirmed that the nanostructured Co3O4 nanoparticles were densely decorated over the N-MWCNT surface. The supercapacitive properties of the composite electrode were studied in aqueous potassium hydroxide (KOH). The composite showed high specific capacitance (406 F g−1 at a current density of 2 A g−1) and excellent cycle stability (93% capacitance retention after 10,000 cycles), demonstrating its potential application in high-performance supercapacitors.

Original languageEnglish
Pages (from-to)39-43
Number of pages5
JournalMaterials Letters
Volume206
DOIs
StatePublished - 1 Nov 2017

Keywords

  • Cobalt oxide
  • Composite
  • N-doped MWCNT
  • Supercapacitors

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