One-dimensional porous nanofibers of Co3O4 on the carbon matrix from human hair with superior lithium ion storage performance

Sci Rep. 2015 Jul 23:5:12382. doi: 10.1038/srep12382.

Abstract

One-dimensional (1D) hierarchical porous nanofibers of Co3O4 possessing of (220) facets on the carbon matrix from human hair (H2@Co3O4) with 20-30 nm in width and 3-5 μm in length are prepared by a facile solvothermal and calcination approach. The well crystallized small Co3O4 particles with the diameter of about 8-12 nm were closely aggregated together in the nanofibers. Electrochemical analyses show that the first discharge capacity of H2@Co3O4 electrode is 1368 mAh g(-1) at the current density of 0.1 A g(-1) based on the total mass of composite. A high reversible capacity of 916 mAh g (-1) was obtained over 100 cycles at 0.1 A g(-1), presenting a good cycling stability. When cycled at a high current density of 1 and 2 A g(-1), the specific capacity of 659 and 573 mAh g(-1) could be still achieved, respectively, indicating a superior power capability.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Absorption, Physicochemical
  • Carbon / chemistry
  • Cobalt / chemistry*
  • Electric Power Supplies*
  • Electrodes*
  • Energy Transfer
  • Equipment Design
  • Equipment Failure Analysis
  • Hair / chemistry*
  • Hair / ultrastructure
  • Humans
  • Lithium / isolation & purification*
  • Materials Testing
  • Metal Nanoparticles / chemistry*
  • Metal Nanoparticles / ultrastructure
  • Nanocomposites / chemistry
  • Nanocomposites / ultrastructure
  • Nanopores / ultrastructure
  • Oxides / chemistry*
  • Particle Size
  • Porosity

Substances

  • Oxides
  • Cobalt
  • Carbon
  • Lithium
  • cobalt oxide