Nano-granulization of gadolinia-doped ceria electrolyte surface by aerosol-assisted chemical vapor deposition for low-temperature solid oxide fuel cells

Jun Woo Kim, Dong Young Jang, Manjin Kim, Hyung Jong Choi, Joon Hyung Shim

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

We have fabricated nano-scale gadolinia-doped ceria (GDC) at the electrode-electrolyte boundary by aerosol-assisted chemical vapor deposition (AACVD) for high-performance solid oxide fuel cells (SOFCs) working at low temperatures below 500 °C. In AACVD, temperature is the key factor affecting the grain size. We have confirmed that by nano-granulizing the electrolyte surface using optimized AACVD, the power output of the SOFC is 50% higher than that of the bare GDC SOFC. From the impedance analysis, significant enhancement of the cathodic oxygen reduction reaction is identified from the AACVD-GDC nano-grain surface treatment.

Original languageEnglish
Pages (from-to)72-77
Number of pages6
JournalJournal of Power Sources
Volume301
DOIs
Publication statusPublished - 2016 Jan 1

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Keywords

  • Aerosol-assisted chemical vapor deposition
  • Ceramic thin films
  • Gadolinia-doped ceria
  • Grain boundaries
  • Solid oxide fuel cells
  • Surface modification

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Energy Engineering and Power Technology
  • Renewable Energy, Sustainability and the Environment
  • Physical and Theoretical Chemistry

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