Micro ceramic fuel cells with multilayered yttrium-doped barium cerate and zirconate thin film electrolytes

Kiho Bae, Dong Young Jang, Ho Jean Jung, Jun Woo Kim, Ji Won Son, Joon Hyung Shim

Research output: Contribution to journalArticle

28 Citations (Scopus)

Abstract

Multi- and mono-layered thin film electrolytes based on BaCe 0.9Y0.1O3-δ (BCY) and BaZr 0.85Y0.15O3-δ (BZY) ceramics are fabricated by pulsed laser deposition (PLD) for use in micro-protonic ceramic fuel cells (micro-PCFCs), and their microstructure and fuel cell performances are investigated. Fully dense and well-crystallized BCY and BZY layers are identified in the multi- and mono-layered electrolytes, and are confirmed by microstructural analyses. Fuel cell and impedance measurements confirm that the bare BCY cells exhibit superior performance to samples with BZY capping; however, this capping does not offer any advantage in terms of operational stability. In contrast, the BCY-capped BZY cell performs better than the bare BZY cell, implying that BCY possesses more active surface kinetics. Anodic improvement is as important as cathodic modification for the intermediate-temperature operation of PCFCs. The BCY-capped BZY cell also demonstrates excellent stability, maintaining a good open circuit voltage for over 10 h.

Original languageEnglish
Pages (from-to)1163-1169
Number of pages7
JournalJournal of Power Sources
Volume248
DOIs
Publication statusPublished - 2014 Jan 1

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Keywords

  • Micro-protonic ceramic fuel cell
  • Multilayer electrolyte
  • Pulsed laser deposition
  • Yttrium-doped barium cerate
  • Yttrium-doped barium zirconate

ASJC Scopus subject areas

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

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