Nanoporous silver cathode surface treated by atomic layer deposition of CeO x for low-temperature solid oxide fuel cells

Ke Chean Neoh, Gwon Deok Han, Manjin Kim, Jun Woo Kim, Hyung Jong Choi, Suk Won Park, Joon Hyung Shim

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

We evaluated the performance of solid oxide fuel cells (SOFCs) with a 50 nm thin silver (Ag) cathode surface treated with cerium oxide (CeO x ) by atomic layer deposition (ALD). The performances of bare and ALD-treated Ag cathodes were evaluated on gadolinia-doped ceria (GDC) electrolyte supporting cells with a platinum (Pt) anode over 300 °C-450 °C. Our work confirms that ALD CeO x treatment enhances cathodic performance and thermal stability of the Ag cathode. The performance difference between cells using a Ag cathode optimally treated with an ALD CeO x surface and a reference Pt cathode is about 50% at 450 °C in terms of fuel cell power output in our experiment. The bare Ag cathode completely agglomerated into islands during fuel cell operation at 450 °C, while the ALD CeO x treatment effectively protects the porosity of the cathode. We also discuss the long-term stability of ALD CeO x -treated Ag cathodes related to the microstructure of the layers.

Original languageEnglish
Article number185403
JournalNanotechnology
Volume27
Issue number18
DOIs
Publication statusPublished - 2016 Mar 24

Keywords

  • Ag
  • atomic layer deposition
  • cathode
  • ceria
  • low temperature
  • solid oxide fuel cell

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Electrical and Electronic Engineering
  • Mechanical Engineering
  • Mechanics of Materials
  • Materials Science(all)

Fingerprint Dive into the research topics of 'Nanoporous silver cathode surface treated by atomic layer deposition of CeO <sub>x</sub> for low-temperature solid oxide fuel cells'. Together they form a unique fingerprint.

  • Cite this