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

16 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

Fingerprint

Atomic layer deposition
Cerium
Solid oxide fuel cells (SOFC)
Silver
Oxides
Electrodes
Cathodes
Temperature
Platinum
Fuel cells
ceric oxide
Gadolinium
Cerium compounds
Porosity
Electrolytes
Islands
Anodes
Thermodynamic stability
Hot Temperature
Microstructure

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)

Cite this

Nanoporous silver cathode surface treated by atomic layer deposition of CeO x for low-temperature solid oxide fuel cells. / Neoh, Ke Chean; Han, Gwon Deok; Kim, Manjin; Kim, Jun Woo; Choi, Hyung Jong; Park, Suk Won; Shim, Joon Hyung.

In: Nanotechnology, Vol. 27, No. 18, 185403, 24.03.2016.

Research output: Contribution to journalArticle

Neoh, Ke Chean ; Han, Gwon Deok ; Kim, Manjin ; Kim, Jun Woo ; Choi, Hyung Jong ; Park, Suk Won ; Shim, Joon Hyung. / Nanoporous silver cathode surface treated by atomic layer deposition of CeO x for low-temperature solid oxide fuel cells. In: Nanotechnology. 2016 ; Vol. 27, No. 18.
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