Remarkable ionic conductivity and catalytic activity in ceramic nanocomposite fuel cells

M. I. Asghar*, S. Jouttijärvi, R. Jokiranta, P. D. Lund

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

Although ceramic nanocomposite fuel cells (CNFCs) have attracted the attention of the fuel cell community due to their low operating temperature (<600 °C), often the performance of the cells is limited due to the low ionic conductivity of the electrolyte and the sluggish reaction kinetics at the electrodes. This results in high ohmic and charge transfer losses in the cell performance. Here we report nanocomposite electrolyte (GDC-NLC) and electrodes (NiO-GDC-NLC and LSCF-GDC-NLC as anode and cathode respectively) with enhanced ionic conductivity and catalytic activity respectively, which significantly improve the ionic transport in the electrolyte layer (ohmic losses ≈ 0.23 Ω cm2) and the reaction kinetics at the electrodes (polarization losses ≈ 0.63 Ω cm2). Microstructural and phase changes in the materials were characterized with X-ray diffraction, scanning electron microscopy, and differential scanning calorimetry to understand the mechanisms in the cells. Our button fuel cell produced an outstanding performance of 1.02 W/cm2 at 550 °C.

Original languageEnglish
Pages (from-to)12892-12899
JournalInternational Journal of Hydrogen Energy
Volume43
Issue number28
Early online date1 Jan 2018
DOIs
Publication statusPublished - Jul 2018
MoE publication typeA1 Journal article-refereed

Keywords

  • Carbonate
  • Catalytic activity
  • Ceramic
  • Fuel cell
  • Ionic conductivity
  • Nanocomposite

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