Slurry spin coating of thin film yttria stabilized zirconia/gadolinia doped ceria bi-layer electrolytes for solid oxide fuel cells

Hyun Joong Kim, Manjin Kim, Ke Chean Neoh, Gwon Deok Han, Kiho Bae, Jong Mok Shin, Gyu-Tae Kim, Joon Hyung Shim

Research output: Contribution to journalArticle

31 Citations (Scopus)

Abstract

Thin ceramic bi-layered membrane comprising yttria-stabilized zirconia (YSZ) and gadolinia-doped ceria (GDC) is fabricated by the cost-effective slurry spin coating technique, and it is evaluated as an electrolyte of solid oxide fuel cells (SOFCs). It is demonstrated that the slurry spin coating method is capable of fabricating porous ceramic films by adjusting the content of ethyl-cellulose binders in the source slurry. The porous GDC layer deposited by spin coating under an optimal condition functions satisfactorily as a cathode-electrolyte interlayer in the test SOFC stack. A 2-μm-thick electrolyte membrane of the spin-coated YSZ/GDC bi-layer is successfully deposited as a dense and stable film directly on a porous NiO-YSZ anode support without any interlayers, and the SOFC produces power output over 200 mW cm−2 at 600 °C, with an open circuit voltage close to 1 V. Electrochemical impedance spectra analysis is conducted to evaluate the performance of the fuel cell components in relation with the microstructure of the spin-coated layers.

Original languageEnglish
Pages (from-to)401-407
Number of pages7
JournalJournal of Power Sources
Volume327
DOIs
Publication statusPublished - 2016 Sep 30

Keywords

  • Gadolinia-doped ceria
  • Solid oxide fuel cells
  • Spin coating
  • Yttria-stabilized zirconia

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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