High proton conduction in grain-boundary-free yttrium-doped barium zirconate films grown by pulsed laser deposition

Daniele Pergolesi, Emiliana Fabbri, Alessandra D'Epifanio, Elisabetta Di Bartolomeo, Antonello Tebano, Simone Sanna, Silvia Licoccia, Giuseppe Balestrino, Enrico Traversa*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

350 Scopus citations

Abstract

Reducing the operating temperature in the 500-750°C range is needed for widespread use of solid oxide fuel cells (SOFCs). Proton-conducting oxides are gaining wide interest as electrolyte materials for this aim. We report the fabrication of BaZr0.8Y0.2O3-δ (BZY) proton-conducting electrolyte thin films by pulsed laser deposition on different single-crystalline substrates. Highly textured, epitaxially oriented BZY films were obtained on (100)-oriented MgO substrates, showing the largest proton conductivity ever reported for BZY samples, being 0.11 S cm-1 at 500°C. The excellent crystalline quality of BZY films allowed for the first time the experimental measurement of the large BZY bulk conductivity above 300°C, expected in the absence of blocking grain boundaries. The measured proton conductivity is also significantly larger than the conductivity values of oxygen-ion conductors in the same temperature range, opening new potential for the development of miniaturized SOFCs for portable power supply.

Original languageEnglish (US)
Pages (from-to)846-852
Number of pages7
JournalNature Materials
Volume9
Issue number10
DOIs
StatePublished - Oct 2010

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'High proton conduction in grain-boundary-free yttrium-doped barium zirconate films grown by pulsed laser deposition'. Together they form a unique fingerprint.

Cite this