Mechanisms of PrOx performance enhancement of oxygen electrodes for low and intermediate temperature solid oxide fuel cells

Matthew Y. Lu, Roberto Scipioni, Beom Kyeong Park, Tianrang Yang, Yvonne A. Chart, Scott A. Barnett*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

Recent developments in solid oxide cells focus on decreasing operating temperatures below 600 °C for improved cost and electrochemical stability in order to improve viability for commercialization. In this work, we improve the performance and stability of La0.6Sr0.4Co0.2Fe0.8O3 δ (LSCF) and a recently developed electrode material, SrTi0.3Fe0.55Co0.15O3 δ (STFC), with addition of PrOx nanoparticles. Single-step PrOx infiltration improves performance of both LSCF and STFC across all tested temperatures (450–650 °C) with the most significant enhancements at lower temperatures. STFC modified with PrOx yields the best overall performance and stability, with the initial polarization resistance of 0.20 Ω cm2 at 550 °C increasing over ~800 h before stabilizing at 0.27 Ω cm2. This represents a factor of ~10 resistance decrease compared to the LSCF electrode at 550 °C. A distribution of relaxation times analysis sheds light on the electrochemical mechanisms impacted by PrOx.

Original languageEnglish (US)
Article number100362
JournalMaterials Today Energy
Volume14
DOIs
StatePublished - Dec 2019

Keywords

  • Fuel cells
  • Infiltration
  • LSCF
  • Praseodymium oxide
  • STFC
  • Solid oxide cells

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Materials Science (miscellaneous)
  • Nuclear Energy and Engineering
  • Fuel Technology
  • Energy Engineering and Power Technology

Fingerprint Dive into the research topics of 'Mechanisms of PrO<sub>x</sub> performance enhancement of oxygen electrodes for low and intermediate temperature solid oxide fuel cells'. Together they form a unique fingerprint.

Cite this