Effect of internal and external constraints on sintering behavior of thin film electrolytes for solid oxide fuel cells (SOFCs)

In Yeop Kim, Mridula Biswas, Jongsup Hong, Kyung Joong Yoon, Ji Won Son, Jong Ho Lee, Byung Kook Kim, Hae June Je, Hae Weon Lee

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

The effect of internal and external constraints on the sintering behavior of yttria-stabilized zirconia (YSZ) thin film electrolytes is investigated for intermediate-temperature solid oxide fuel cells (SOFCs). The external constraints imposed by rigid substrates result in major process flaws, such as vertical and delamination cracks during film densification, in a chemical solution deposition (CSD) process. In this study, YSZ nanoparticles are incorporated into the precursor solution to impose internal constraints and control the shrinkage rate of the sol-gel matrix. Because the structural stability of the thin film is determined by the grain size distribution, it is critical to optimize the content and dispersion structure of the nanoparticles and the sintering temperature to obtain a gas-tight thin film electrolyte for SOFCs. A clustering model is proposed to obtain a comprehensive understanding of the sintering behavior of the YSZ thin-film electrolyte containing the nanoparticles in the CSD process.

Original languageEnglish
Pages (from-to)13131-13138
Number of pages8
JournalCeramics International
Volume40
Issue number8 PART B
DOIs
Publication statusPublished - 2014 Sep

Bibliographical note

Funding Information:
This research was financially supported by the Institutional Research Program of the Korea Institute of Science and Technology and the Fundamental Research and Development Program for Core Technology of Materials, funded by the Ministry of Knowledge Economy, Republic of Korea .

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

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