A bi-functional cathode structure for alkaline-acid direct ethanol fuel cells

Liang An, T. S. Zhao, J. B. Xu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

55 Citations (Scopus)

Abstract

An issue associated with the use of hydrogen peroxide as the oxidant in the so-called alkaline-acid direct ethanol fuel cell (AA-DEFC) is the problem of H2O2decomposition, which causes a significant decrease in the cathode potential. The present work addresses this issue by developing a bi-functional cathode structure that is composed of the nickel-chromium (Ni-Cr) foam (functioning as the diffusion layer) with a highly dispersed gold particles (functioning as the catalyst layer) deposited onto the skeleton of the foam. This integrated cathode structure allows not only a reduction in H2O2decomposition, but also an enhancement in the species transport in the cathode of the AA-DEFC. The fuel cell performance characterization shows that the use of the bi-functional cathode structure in the AA-DEFC enables the peak power density to be increased to 200 mW cm-2from 135 mW cm-2resulting from the use of the conventional cathode.
Original languageEnglish
Pages (from-to)13089-13095
Number of pages7
JournalInternational Journal of Hydrogen Energy
Volume36
Issue number20
DOIs
Publication statusPublished - 1 Oct 2011
Externally publishedYes

Keywords

  • Alkaline-acid direct ethanol fuel cell
  • Bi-functional structure
  • Fuel cell
  • Hydrogen peroxide decomposition
  • Impregnation-reduction method
  • Nickel-chromium foam

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Condensed Matter Physics
  • Energy Engineering and Power Technology

Cite this