Flexible films derived from electrospun carbon nanofibers incorporated with Co3O4 hollow nanoparticles as self-supported electrodes for electrochemical capacitors

Fang Zhang, Changzhou Yuan, Jiajia Zhu, Jie Wang, Xiaogang Zhang, Xiong Wen Lou

Research output: Contribution to journalArticlepeer-review

Abstract

Flexible porous films are prepared from electrospun carbon nanofibers (CNFs) embedded with Co3O4 hollow nanoparticles (NPs) and are directly applied as self-supported electrodes for high-performance electrochemical capacitors. Uniform Co3O4 hollow NPs are well dispersed and/or embedded into each CNF with desirable electrical conductivity. These Co3O4-CNFs intercross each other and form 3D hierarchical porous hybrid films. Benefiting from intriguing structural features, the unique binder-free Co3O4 hollow NPs/CNF hybrid film electrodes exhibit high specific capacitance (SC), excellent rate capability and cycling stability. As an example, the flexible hybrid film with loading of 35.9 wt% Co3O4 delivers a SC of 556 F g -1 at a current density of 1 A g-1, and 403 F g -1 even at a very high current density of 12 A g-1. Remarkably, almost no decay in SC is found after continuous charge/discharge cycling for 2000 cycles at 4 A g-1. This exceptional electrochemical performance makes such novel self-supported Co3O4-CNFs hybrid films attractive for high-performance electrochemical capacitors.

Original languageEnglish
Pages (from-to)3909-3915
Number of pages7
JournalAdvanced Functional Materials
Volume23
Issue number31
DOIs
Publication statusPublished - 2013 Aug 19
Externally publishedYes

Keywords

  • capacitors
  • electrochemical performance
  • nanoporous materials
  • porous films

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

Fingerprint Dive into the research topics of 'Flexible films derived from electrospun carbon nanofibers incorporated with Co<sub>3</sub>O<sub>4</sub> hollow nanoparticles as self-supported electrodes for electrochemical capacitors'. Together they form a unique fingerprint.

Cite this