Electrospun Carbon Nanofibers with in Situ Encapsulated Co3O4 Nanoparticles as Electrodes for High-Performance Supercapacitors

Sara Abouali, Mohammad Akbari Garakani, Biao Zhang, Zheng Long Xu, Elham Kamali Heidari, Jian Qiu Huang, Jiaqiang Huang, Jang Kyo Kim

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

A facile electrospinning method with subsequent heat treatments is employed to prepare carbon nanofibers (CNFs) containing uniformly dispersed Co3O4 nanoparticles as electrodes for supercapacitors. The Co3O4/CNF electrodes with ∼68 wt % active particles deliver a remarkable capacitance of 586 F g-1 at a current density of 1 A g-1. When the current density is increased to 50 A g-1, ∼66% of the original capacitance is retained. The electrodes also present excellent cyclic stability of 74% capacity retention after 2000 cycles at 2 A g-1. These superior electrochemical properties are attributed to the uniform dispersion of active particles in the CNF matrix, which functions as a conductive support. The onionlike graphitic layers formed around the Co3O4 nanoparticles not only improve the electrical conductivity of the electrode but also prevent the separation of the nanoparticles from the carbon matrix. (Graph Presented).
Original languageEnglish
Pages (from-to)13503-13511
Number of pages9
JournalACS Applied Materials and Interfaces
Volume7
Issue number24
DOIs
Publication statusPublished - 24 Jun 2015
Externally publishedYes

Keywords

  • carbon nanofiber
  • cobalt oxide
  • electrospinning
  • graphitization
  • pseudocapacitance
  • supercapacitor

ASJC Scopus subject areas

  • Materials Science(all)

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