High-performance thin-film protonic ceramic fuel cells fabricated on anode supports with a non-proton-conducting ceramic matrix

Kiho Bae, Ho Sung Noh, Dong Young Jang, Jongsup Hong, Hyoungchul Kim, Kyung Joong Yoon, Jong Ho Lee, Byung Kook Kim, Joon Hyung Shim, Ji Won Son

Research output: Contribution to journalArticle

21 Citations (Scopus)

Abstract

A novel strategy to fabricate high-performance thin-film protonic ceramic fuel cells (PCFCs) is introduced by building thin-film PCFC components, including BaCe0.55Zr0.3Y0.15O3-δ (BCZY) electrolytes (1.5 μm) over anode supports consisting of non-proton-conducting ceramic and metal catalytic phases. Ni-yttria-stabilized zirconia (YSZ) was used as supports in this study, which is superior in terms of its well-established facile fabrication process, along with physical and chemical stability, compared to proton-conducting materials. The Ni-YSZ supports provided a flat and smooth deposition surface that facilitates the deposition of the thin film components. A Ni-BCZY anode (∼3 μm), a dense BCZY electrolyte layer (∼1.5 μm), and a porous Ba0.5Sr0.5Co0.8Fe0.2O3-δ cathode (∼2 μm) were sequentially fabricated over the Ni-YSZ substrates using pulsed laser deposition, followed by post-annealing, and the process was optimized for each component. A fully integrated thin-film PCFC microstructure was confirmed, resulting in high open circuit voltages exceeding 1 V at operating temperatures in the range of 450-650 °C. A promising fuel cell performance was obtained using the proposed fuel cell configuration, reaching a peak power density of 742 mW cm-2 at 650 °C.

Original languageEnglish
Pages (from-to)6395-6404
Number of pages10
JournalJournal of Materials Chemistry A
Volume4
Issue number17
DOIs
Publication statusPublished - 2016

All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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